Quote:
Originally Posted by billy111  KorAll bro pin number 3 |
Pin 3 is SIMCLK (clock synchronization), it goes directly from UCP200 MAIN CHIP.
i think it isn't good idea for you to reball UCP200.
First of all, check vsim voltage , it should be 1.8v-2.8v at pin #1. When phone startup, CPU always check SIM card presence, you must be very regardful, it very quick process, when SIM card absent.
Post result.