Cavli Wireless CQS29X Hardware Manual

Lte cat 4/2g android/linux smart module

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Cavli CQS29X

LTE CAT 4 Android/Linux

LTE CAT 4/2G Android/Linux

Smart Module

Hardware Manual

Pre-Release Version 1.0

External Release Version 1.7

www.cavliwireless.com

CQS29X Hardware Manual

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Page 1 CQS29X Hardware Manual Cavli CQS29X Cavli CQS29X LTE CAT 4 Android/Linux LTE CAT 4/2G Android/Linux Smart Module Smart Module Hardware Manual Hardware Manual Pre-Release Version 1.0 External Release Version 1.7 www.cavliwireless.com...
Page 2 COPYRIGHT THE INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF CAVLI WIRELESS INC. TRANSMITTING, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THE CONTENT ARE FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES.
Page 3: Table Of Contents
2.3. Module Function ........................... 13 3 Interface Application Description ....................15 3.1 Chapter Overview ........................15 3.2 Module Interface ......................... 16 3.2.1 CQS29X Pin Layout ....................................16 3.2.2 Pin Description ......................................17 3.2.3 Absolute maximum ratings ................................18 3.2.4 CQS29X Pin Interface .................................... 18 Power Interfaces ........................
Page 4 CQS29X Hardware Manual 3.6.3 UART0 Serial Port ..................................... 36 3.6.4 Serial Port Application Circuit ..............................36 3.7 SPI interface ..........................37 3.8 I2C/I3C Interface ......................... 38 3.9 SDC Interface ..........................40 3.10 USIM Interface ..........................42 3.10.1 USIM Card Reference Circuit ..............................42 3.11 Motor Drive Interface .......................
Page 5 5.4.2 Digital-logic characteristics ................................65 5.5 Power Supply ..........................67 5.6 Power Consumption ........................67 6 Structural and Mechanical Properties .....................69 6.1 CQS29X module mechanical size ..................... 69 6.2 CQS29X Recommended footprint ..................71 7 Appendix ..............................72 7.1 Chapter Overview ........................72 7.2 Abbreviations ..........................
Page 6: Version History
CQS29X Hardware Manual VERSION HISTORY Version Edit Date Initial Version • ERV 1.0 17/09/2023 Updated Timing Diagram • ERV 1.1 22/07/2024 • Pin Name and Functions updated • FM Antenna Information added ERV 1.2 28/08/2024 • Memory information updated • Temperature information updated •...
Page 7: Introduction
CQS29X Hardware Manual Introduction This document is the Hardware Manual of the Cavli Wireless solution product CQS29X Module, which describes: ✓ The hardware composition and functional features of the module The definition and usage of the application interface ✓ ✓...
Page 8: Module Overview
2.1. Module Introduction CQS29X is the LTE Cat 4 module from Cavli C-Series module family that supports data rates up to 150 Mbit/s in downlink and 50 Mbit/s in uplink with 2G fall back. The Android/Linux smart module is equipped with the Cortex A53 quad-core CPU architecture with built-in Adreno™...
Page 9 CQS29X Hardware Manual Table 1 Variant list based on Band configuration Module Bands LTE BANDS: 1/2/3/4/5/7/8/12/13/18/19/20/25/26/28/38/40/41/66/71 CQS29x - WW GSM BANDS: GSM900/ GSM1800 LTE BANDS: 1/3/5/7/8/18/19/20/26/28/38/40/41 CQS29x - EAJ GSM BANDS: GSM900/ GSM1800 LTE BANDS: 1/3/5/8/18/19/26/28 CQS29x - AN GSM BANDS:...
Page 10: Module Characteristics
CQS29X Hardware Manual 2.2. Module Characteristics Table 2 Key Features Characteristics Description Physical Characteristics 40.5 x 40.5 x 2.7 mm Fixed Way LCC+LGA package Operating Voltage 3.5V – 4.4V Typical Voltage 4.2 V Quad-core ARM Cortex-A53 64-bit CPU @ 2.0 GHz with 512...
Page 11 CQS29X Hardware Manual ✓ Compliant with SDIO 3.0 protocol ✓ 4-bit SDC ✓ Upto 4 I2C Interfaces ✓ Version 3.0 Standard ✓ Upto 2 I3C Interface ✓ Sensor based. Mainly for Accelerometer and Gyro meter ✓ 1x Flash Interface Interface ✓...
Page 12 CQS29X Hardware Manual Haptic ✓ Single Motor Driver Interface Driver LTE BANDS: 1/ 2/ 3/ 4/ 5/ 7/ 8/ 12/ 13/ 18/ 19/ 20/ 25/ 26/ 28/38/ 40/ 41/ 66/ 71 Frequency Band GSM BANDS: GSM900/ GSM1800 ✓ FDD/TDD LTE CAT /4/2G Data Network ✓...
Page 13: Module Function
✓ Memory unit ✓ RF Transceiver unit ✓ RF front-end unit ✓ RF Band SAW Duplex array ✓ Multi-Band PA ✓ Interfaces The functional block diagram of the CQS29X module is shown below： Figure 1 CQS29X Functional Block Diagram www.cavliwireless.com...
Page 14 CQS29X Hardware Manual 2.4 Module Working Mode Table 3 Working Modes Working Mode Description Turn off the machine In the case of shutdown, the module is fully powered off. Flight Mode The module closes the module RF circuit, unable to interact with the...
Page 15: Interface Application Description
CQS29X Hardware Manual Interface Application Description 3.1 Chapter Overview This chapter mainly describes the interface definition and application of this module. It contains the following sections: • Module Interface • Power Interface • Switching Machine Reset Mode • USB Interface •...
Page 16: Module Interface
CQS29X Hardware Manual 3.2 Module Interface 3.2.1 CQS29X Pin Layout CQS29X pins are assigned as follows： Figure 2 CQS29X module Interface definition (top view) NOTE • All RESERVED and unused pin feet need to be left floating www.cavliwireless.com...
Page 17: Pin Description
CQS29X Hardware Manual 3.2.2 Pin Description Table 4 Pin Description Pin Type Description PAD TYPE Analog Input Analog Output Bidirectional digital with CMOS input Digital Input (CMOS) Digital Output (CMOS) Digital Input/Output Open Drain High voltage tolerant High Impedance output...
Page 18: Absolute Maximum Ratings
-0.3 V 1.39 V -0.3 V 1.39 V 3.2.4 CQS29X Pin Interface The CQS29X module has the LGA interface. The module interface definition is shown in the following table: Table 6 Pin Interface Description & Configurable Pin Name DC Characteristics...
Page 19 CQS29X Hardware Manual EAR_P Earpiece output (+) EAR_N Earpiece output (-) Audio line differential AUX_P output (+) Audio line differential AUX_M output (-) Ground Pin USB0_HS_SM_D_N USB differential data (-) USB0_HS_SM_D_P USB differential data (+) Ground Pin RESERVED (U)SIM2 card...
Page 20 CQS29X Hardware Manual max = 0.45 V TS_RST TP reset min = 1.35 V 1.8/2.95 V output power 1.8/2.95 V VREG_L4A_2P96 for SD card pull-up circuits 22 mA General-purpose GPIO_28 input/output max = 0.45 V UART0_TXD UART0 transmit min = 1.35 V max = 0.63 V...
Page 21 CQS29X Hardware Manual DSI0_L1_P LCD MIPI lane 1 data (+) DSI0_L2_N LCD MIPI lane 2 data (-) DSI0_L2_P LCD MIPI lane 2 data (+) DSI0_L3_N LCD MIPI lane 3 data (-) DSI0_L3_P LCD MIPI lane 3 data (+) Ground Pin...
Page 22 CQS29X Hardware Manual MAIN_ANT Main antenna interface Ground Pin Ground Pin General-purpose GPIO_106 input/output clock external SNSR_I2C_SCL sensor SNSR_I2C_SDA I2C data for external sensor max = 0.63 V DBG_RXD Debug UART receive min = 1.17 V max = 0.45 V...
Page 23 CQS29X Hardware Manual General-purpose GPIO_36 input/output Vnom = 1.8 V VREG_L15A_1P8 1.8V output max = 200 mA General-purpose GPIO_57 input/output General-purpose GPIO_58 input/output PWRKEY Turn on/off the module General-purpose PM_GPIO_04 input/output General-purpose GPIO_16 input/output General-purpose GPIO_17 input/output General-purpose GPIO_14 input/output...
Page 24 CQS29X Hardware Manual Ground Pin BAT_P Battery voltage detect (+) BAT_THERM Battery temperature detect Ground Pin Headphone right channel HEAD_R output Headphone reference HEAD_GND ground (FM Antenna function integrated) Headphone left channel HEAD_L output HEAD_DET Headset hot-plug detect Ground Pin...
Page 25 CQS29X Hardware Manual max = 0.45 V UART1_TXD UART1 transmit min = 1.35 V Bias voltage output for 3 MIC_BIAS3 Vnom = 1.8 V microphone Vnom = 3.0 V VREG_L17A_3P0 3.0V output max = 192 mA CSI0_CLK_N MIPI CSI0 clock (-)
Page 26 CQS29X Hardware Manual NFC_RFCLK3 NFC clock General-purpose GPIO_86 input/output BAT_M Battery voltage detect (-) Vmin = 3.5 V Power supply VPH_PWR Vnom = 3.8 V peripherals Vmax = 4.4 V min = 0 V BAT_ID Battery type detect max = 1.875 V Cable power-on;...
Page 27 CQS29X Hardware Manual Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin Ground Pin RESET_IN/VOL- Reset the module Ground Pin...
Page 28 CQS29X Hardware Manual Ground Pin RESERVED Ground Pin Ground Pin Ground Pin USB0_CC2 USB Type-C detect 2 Ground Pin Ground Pin USB0_CC1 USB Type-C detect 1 Ground Pin Ground Pin USB 3.1 channel 1 USB0_SS_RX0_P superspeed receive (+) USB 3.1 channel 1...
Page 29: Power Interfaces
3.3 Power Interfaces The CQS29X module provides three VBATT pins to connect to the external power supply. The module is to be operated between the voltages of 3.5 V to 4.4 V and the recommended operating voltage is 4.2V. Ensure the source is capable of providing a sufficient current.
Page 30: Power Reference Circuit
CQS29X Hardware Manual Figure 3 Power supply reference circuit 3.3.2 Power reference circuit Ensure the voltages are kept within the specified ranges and that there is minimal or no noise within the trace. Advised to keep the VBATT trace width within 3mm. A surge/transient suppressor near to the external source is advised.
Page 31 CQS29X Hardware Manual Table 7 Power Key definition Pin No. Pin name Description PWRKEY Active Low pin Cable power-on; Initiate power-on when PWRKEY_ALT grounded NOTE • For auto bootup PWRKEY_ALT (Pin 186) can be hardwired to GND The reference schematic for Power ON using a switch is given below:...
Page 32: Reset Control
CQS29X Hardware Manual 3.4.2 Reset Control The module is Reset by pulling down/grounding the RESET_IN pin (Pin 225). Pull the pin up after successful Reset. Table 8 RESET pin definition Pin No. Pin name Voltage Description Definition Module Reset Control...
Page 33: Usb Interface
CQS29X Hardware Manual 3.5 USB Interface The module supports USB 2.0 and USB 3.1 standard of High speeds up to 480Mbps and Full speed up to 12Mbps. It complies with USB 2.0 standard by providing a high-speed differential channel of USB_DP and USB_DM pins (Pin 14 and 13).
Page 34: Uart Interface
CQS29X Hardware Manual The USB reference circuit diagram in USB 2.0 mode is given below: Figure 9 USB 3.1 Interface NOTE • USB_VBUS and CC pins must be connected for USB enumeration 3.6 UART Interface CQS292 provide 3 UART interfaces ✓...
Page 35: Uart1 Serial Port
CQS29X Hardware Manual 3.6.1 UART1 Serial Port 2-wire UART Interface meant for external/peripheral Interfacing Table 11 UART1 Serial port application Parameter Level value (V) Pin No. Pin name Description typical P - 0.45 Data UART1_RXD reception 0.45 0.65 × P P + 0.3 V...
Page 36: Uart0 Serial Port
CQS29X Hardware Manual 3.6.3 UART0 Serial Port 4-wire UART Interface with CTS and RTS Hardware Flow Control for peripheral Interfacing Table 13 UART5 serial port pin definition Level value (V) Pin No. Pin name Description Parameter typical UART0_CTS UART0_RTS P - 0.45...
Page 37: Spi Interface
CQS29X Hardware Manual Figure 11 Level conversion technique 3.7 SPI interface The module has a single SPI Interface and functions only in the Master mode. Table 14 SPI interface pin definition Pin No. Pin name Description SPI_SCLK Clock SPI_MOSI Master output slave input...
Page 38: I2C/I3C Interface
CQS29X Hardware Manual Figure 12: SPI Timing diagram 3.8 I2C/I3C Interface The module supports four I2C interfaces. All I2C interfaces are open drain signals and therefore you must pull them up externally. The reference power domain is 1.8V. SENSOR_I2C only supports sensors of ADSP architecture.
Page 39 CQS29X Hardware Manual 0.45 I2C bus clock 0.65 × P P + 0.3 V output -0.3 V 0.35 × P I2C bus data P - 0.45 input and TS_I2C_SDA output 0.45 Camera I2C 0.65 × P P + 0.3 V...
Page 40: Sdc Interface
CQS29X Hardware Manual The I2C/I3C reference circuit is connected as follows: Figure 13 I2C Reference Circuit 3.9 SDC Interface The module has a single SDC 4-bit interface which is SD 3.0 compliant. It supports hot swap functionality and has dual voltage support.
Page 41 CQS29X Hardware Manual The SDC reference circuit is connected as follows: Figure 14 SDC Reference Circuit Figure 15: SD Timing Diagram 1 www.cavliwireless.com...
Page 42: Usim Interface
UIM1_CLK USIM card reset UIM1_RESET USIM card detection UIM1_PRESENT 3.10.1 USIM Card Reference Circuit The CQS29X module does not come with a USIM card slot. The User needs to design a USIM card slot on their own interface board. www.cavliwireless.com...
Page 43: Motor Drive Interface
CQS29X Hardware Manual The USIM card interface reference circuit is as follows: Figure 17 USIM design circuit diagram NOTE • The USIM interface cable is recommended to use ONSEMI's SMF15C device for ESD protection. The peripheral circuit components should be placed close to the card holder. The SIM card holder is close to the module layout.
Page 44: Led Interfaces
CQS29X Hardware Manual The pin definition of the motor drive interface is listed below. Table 18 Motor drive interface pin definitions Pin No. Pin name Description Vibration motor driver output control VIB_DRV The reference circuit is shown below. Figure 18 Motor controller reference circuit 3.12 LED Interfaces...
Page 45 CQS29X Hardware Manual GPIO_107 General-purpose input/output GPIO_32 General-purpose input/output GPIO_49 General-purpose input/output GPIO_104 General-purpose input/output GPIO_105 General-purpose input/output GPIO_103 General-purpose input/output GPIO_102 General-purpose input/output GPIO_99 General-purpose input/output GPIO_48 General-purpose input/output GPIO_35 General-purpose input/output GPIO_33 General-purpose input/output GPIO_34 General-purpose input/output GPIO_36...
Page 46: Adc
CQS29X Hardware Manual GPIO_86 General-purpose input/output GPIO_101 General-purpose input/output GPIO_100 General-purpose input/output GPIO_98 General-purpose input/output GPIO_111 General-purpose input/output General-purpose input/output PM_GPIO_04 General-purpose input/output PM_GPIO_03 General-purpose input/output PMU_GPIO_08 General-purpose input/output PM_GPIO_07 LPI_GPIO_21 General-purpose input/output LPI_GPIO_22 General-purpose input/output LPI_GPIO_25 General-purpose input/output LPI_GPIO_26...
Page 47: Lcm Interface
CQS29X Hardware Manual 3.15 LCM Interface The module provides one LCM Interface via the MIPI-DSI Standard. It is a 4-bit D-PHY v1.2 supported DSI Lane at 1.5 Gbps per lane architecture with split link support. It provides an HD+ Display output of 1680 x 720 resolution at 60FPS.
Page 48: Touch Control Interface
CQS29X Hardware Manual DSI0_L1_N LCD MIPI lane 1 data (-) DSI0_L1_P LCD MIPI lane 1 data (+) DSI0_L2_N LCD MIPI lane 2 data (-) DSI0_L2_P LCD MIPI lane 2 data (+) DSI0_L3_N LCD MIPI lane 3 data (-) DSI0_L3_P LCD MIPI lane 3 data (+)
Page 49: Camera Serial Interface
CQS29X Hardware Manual Table 23 TS Interface Pin definitions Pin No. Pin name Description Touch Screen Interrupt TS_INT_N TS_RST Touch Screen Reset TS_I2C_SCL Touch Screen Clock TS_I2C_SDA Touch Screen Data 3.17 Camera Serial Interface The module has two MIPI-CSI 4-bit based Camera interfaces. It supports a maximum pixel output of 25MP.
Page 50 CQS29X Hardware Manual CSI1_LN2_N MIPI CSI1 lane 2 data (-) CSI1_LN2_P MIPI CSI1 lane 2 data (+) CSI0_CLK_N MIPI CSI0 clock (-) CSI0_LN0_N MIPI CSI0 lane 0 data (-) CSI0_LN1_N MIPI CSI0 lane 1 data (-) CSI0_LN2_N MIPI CSI0 lane 2 data (-)
Page 51: Audio Interfaces
CQS29X Hardware Manual Reset of camera 2 CAM2_RST_N Master clock of camera 2 CAM_MCLK2 I2C clock of camera 1 CCI_I2C_SCL1 I2C data of camera 1 CCI_I2C_SDA1 Figure 21 Camera Serial Interface Reference Circuit 3.18 Audio Interfaces The module provides two analog output channels (1x Headphone, 1x Aux), two analog input channels (2x MIC) and two digital input channels (2xDMIC).
Page 52: Head
CQS29X Hardware Manual Figure 22: I2S Timing Diagram 3.18.1 Head The module provides an analog audio output via this interface and can be given to a headphone jack. Hot plug detection is possible using the HEAD_DET pin (Pin 16) Table 25 Head pin definition Pin No.
Page 53: Ear
CQS29X Hardware Manual Figure 23 Head Jack 3.18.3 EAR The module provides an analog audio output this interface. This can be connected to a speaker via an amplifier. Table 27 AUX Pin definition Pin No. Pin name Description EAR_P Earpiece out positive...
Page 54: Analog Mic
CQS29X Hardware Manual NOTE • Audio Gain control is done via software. 3.18.4 Analog MIC The module supports two analog audio inputs. ECM is possible. Table 28 Analog MIC Pin definition Pin No. Pin name Description MIC1_P Microphone input for channel 1 (+)
Page 55: Antenna
50Ω characteristic impedance WIFI/BT_ANT The pin-201 of the CQS29X is the main antenna interface and pin 171 is diversity antenna interface. To facilitate the debugging of the antenna, a π-type matching circuit needs to be added to the main board, and a 50-ohm impedance line is taken.
Page 56 Figure 26 Diversity Antenna matching circuit The pin 163 of CQS29X is the GNSS antenna interface. The CQS29X has a dedicated antenna L1, it supports GPS, GLONASS, BEIDOU, QZSS, Galileo, With QZSS and SBAS Ranging support. In order to facilitate antenna debugging, a π-type matching circuit needs to be added to the motherboard and a 50-ohm impedance line is used.
Page 57 CQS29X Hardware Manual Passive antenna mode and Active antenna mode • External power needs to be provided since the module itself cannot supply power to GNSS Active antenna. Figure 27 GNSS active antenna matching circuit Figure 28 GNSS passive antenna matching circuit NOTE •...
Page 58: Rf Trace Reference
3.20.1 RF Trace Reference The main set of the CQS29X module are extracted by pad. The antenna pad to the antenna feed point must use microstrip lines or other types of RF traces. The characteristic impedance of the signal line should be controlled at 50Ω.
Page 59: Gnss Interface
3.22 FM Interface FM functionality is integrated in CQS29x. The current design will allow the earphone itself to serve as the FM antenna when plugged into the headphone jack. In case an external antenna for FM is to be interfaced, it...
Page 60 CQS29X Hardware Manual www.cavliwireless.com...
Page 61: Overall Technical Indicators
CQS29X Hardware Manual Overall Technical Indicators 4.1 Chapter Overview The CQS29X module RF overall specifications include the following sections: ✓ Working frequency ✓ GNSS Performances ✓ Antenna requirements 4.2 Working Frequency Table 33 RF frequency table Frequency band Uplink frequency...
Page 62 CQS29X Hardware Manual LTE B28 703MHz – 748MHz 758MHz – 803MHz LTE B40 2300MHz – 2400Mhz 2300MHz – 2400Mhz LTE B41 2496MHz – 2690MHz 2496MHz – 2690MHz LTE B66 1710 MHz – 1780 MHz 2110 MHz – 2200 MHz LTE B71 663MHz –...
Page 63: Interface Electrical Characteristics
-55°C 125°C 5.3 Electrostatic Property There is no overvoltage protection inside the CQS29X module. The ESD protection is required when the module is used to ensure product quality. ESD design recommendations: ✓ The USB port needs to add TVS on VDD, D+, D- for protection, and the TVS parasitic capacitance on D+/D- is <2pF...
Page 64: Module I/O Level
CQS29X Hardware Manual ✓ ESD control of the surrounding environment and operators is required during module production, assembly and laboratory testing Table 35 CQS29X ESD Features Test port Contact discharge Air discharge Unit USB interface ±4 ±8 USIM interface ±4 ±8...
Page 65: Digital-Logic Characteristics
CQS29X Hardware Manual 5.4.2 Digital-logic characteristics A digital I/O’s performance specification depends on its pad type, its usage, and/or its supply voltage: Table 37 1.8 V GPIO Digital Logic Characteristics Parameter Description Unit High-level input voltage, 0.65 × P P + 0.3 V...
Page 66 CQS29X Hardware Manual Table 39 SDC 1.8V mode DC Specifications (P=P2) Parameter Description Unit High-level input voltage 1.27 Low-level input voltage -0.3 V 0.58 High-level output voltage Low-level output voltage 0.45 Input high leakage current µA Input low leakage current µA...
Page 67: Power Supply
CQS29X Hardware Manual 5.5 Power Supply The CQS29X module input power requirements are as follows: Table 41 CQS29X Module operating voltage Parameter Minimum value Typical value Maximum value Input Voltage 3.5V 4.2V 4.4V The power-on time of any interface of the module must not be earlier than the boot time of the module, otherwise the module may be abnormal or damaged.
Page 68 CQS29X Hardware Manual Band 66 94.25 92.7 AT+CFUN=0 SLEEP 27.05 SHUTDOWN Table 43 Linux Power Consumption table Current consumption @ 23dBm and 3.7V Mode Band Tx Idle Peak Tx @ Centre frequency Unit Band 1 89.55 Band 2 89.96 Band 3 90.38...
Page 69: Structural And Mechanical Properties
CQS29X Hardware Manual Structural and Mechanical Properties 6.1 CQS29X module mechanical size The figure below shows the top and bottom view of the module. Figure 32 Top view and bottom view of the module Figure 33 CQS29X module dimensions www.cavliwireless.com...
Page 70 CQS29X Hardware Manual Figure 34 CQS29X module dimensions bottom www.cavliwireless.com...
Page 71: Cqs29X Recommended Footprint
CQS29X Hardware Manual 6.2 CQS29X Recommended footprint Figure 35 Recommended Footprint www.cavliwireless.com...
Page 72: Appendix
CQS29X Hardware Manual Appendix 7.1 Chapter Overview ✓ Abbreviations ✓ Safety and precautions 7.2 Abbreviations Abbreviations Full name 3GPP Third Generation Partnership Project Access Point Adaptive multi-rate Bit Error Rate China Compulsory Certification CDMA Code Division Multiple Access European Conformity...
Page 73 CQS29X Hardware Manual EDGE Enhanced Data Rate for GSM Evolution European Union Electromagnetic Compatibility Electrostatic Discharge Federal Communications Commission GPRS General Packet Radio Service Global System for Mobile Communication HSDPA High-Speed Downlink Packet Access HSPA Enhanced High Speed Packet Access...
Page 74: Safety And Precautions
CQS29X Hardware Manual Transmitting Direction UART Universal Asynchronous Receiver-Transmitter UMTS Universal Mobile Telecommunications System USIM Universal Subscriber Identity Module USSD Unstructured Supplementary Service Data VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access WWAN Wireless Wide Area Network 7.3 Safety and Precautions...

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