Nokia 301 Service Manual page 155

RM-839; RM-840; RM-841
System Module
standard. It supports both 1.8V and 3.0V SIM Cards with T=0 and T=1 protocols supported by hardware. The
SIM card is provided with a 3.25MHz clock and can be configured into low power modes. All SIM related clock
signals are controlled by X-GOLD614.
Figure 45 Dual SIM controller
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