Table of Contents
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Safety Guidelines ................................................................................................................................................................ 4
Introduction ......................................................................................................................................................................... 5
Getting to Know Your T-Mobile 5G Gateway ......................................................................................................................... 5
Physical Interfaces.......................................................................................................................................................... 5
Setting up the T-Mobile 5G Gateway .................................................................................................................................... 6
Recommended Setup: Use the Mobile App ...................................................................................................................... 6
Manual Setup: Identify an Ideal Location ........................................................................................................................ 6
Connecting Power to the T-Mobile 5G Gateway .......................................................................................................... 6
Starting the T-Mobile 5G Gateway .............................................................................................................................. 7
Connecting Devices ............................................................................................................................................................ 7
Connecting Wi-Fi Devices ............................................................................................................................................... 7
Connecting Ethernet Devices .......................................................................................................................................... 8
Viewing Connected Devices ............................................................................................................................................ 8
Accessing Your Web GUI (Graphical User Interface) ........................................................................................................... 8
Home Screen .................................................................................................................................................................. 9
Language Selection .................................................................................................................................................. 10
Replacing the SIM Card ...................................................................................................................................................... 10
Resetting the T-Mobile 5G Gateway .............................................................................................................................. 13
Troubleshooting ................................................................................................................................................................ 14
No Signal ...................................................................................................................................................................... 14
Prevent Overheating ..................................................................................................................................................... 14
T-Mobile 5G Gateway Does Not Start ............................................................................................................................ 14
Poor Internet Experience ............................................................................................................................................... 14
Forget Your Admin Password? ...................................................................................................................................... 14
Understanding the LCD ..................................................................................................................................................... 15
Connection ................................................................................................................................................................... 15
Devices ......................................................................................................................................................................... 15
Messages .................................................................................................................................................................... 16
Language Settings ........................................................................................................................................................ 17
Technical Specifications .................................................................................................................................................... 19
Terms and Conditions ........................................................................................................................................................ 20
Privacy Policy .................................................................................................................................................................... 20
Customer Support ............................................................................................................................................................. 20
T-Mobile 5G Gateway User Guide
Page
3
Need help? Visit
https://www.t-mobile.com/internethelp
or call T-Mobile customer service at
or call Metro support service at
1-844-275-9310
1-888-8Metro8
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Table of Contents
Need help?
Do you have a question about the FAST 5688W and is the answer not in the manual?
Questions and answers
I want to power this router from a UPS. Do I have to go into the C-port at 15V, or can I use the POE (ethernet ports) ?
The SAGEMCOM FAST 5688W router requires a 15V connection to the USB Type-C port and cannot be powered using Power over Ethernet (PoE) through the Ethernet ports.
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I just want to leave a comment and don't see anywhere else to leave it. Thank you so much for having this information here. T-moble's site did not have instructions to hard reset this model and I was so frustrated becausenothing else would work. I was finally able to get the internet reconnected and able to sleep knowing my son's medical devices were connected properly and would not drop every few minutes.
How do I reset the wi-fi password
To reset the Wi-Fi password on a SAGEMCOM FAST 5688W, follow these steps:
1. Access the gateway settings by using a script and entering the admin password from the sticker on the device (not the Wi-Fi password).
2. If you changed the admin password, use the updated one.
3. Once logged in, you will see a menu with several options.
4. Navigate through the menu to find the option to change or disable Wi-Fi settings.
5. Make the desired changes, including updating the Wi-Fi password.
If you cannot access the settings due to a forgotten admin password, perform a hard reset:
1. Make sure the device has power.
2. Press and hold the reset button on the gateway until the device resets.
3. After reset, use the default admin credentials on the device sticker to log in and update the Wi-Fi password.
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