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4. TROUBLESHOOTING
Checking Flow
START
Does the SIM cards
supports 2.85V ?
YES
Voltage at pin1 of
J301 is 2.85V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
Change SIM Card
NO
Change the SIM Card. Our phone
supports only 3V SIM card.
Voltage
NO
at VSIM of U101
Is 2.85V?
NO
NO
Redownload SW.
Does it work
Properly?
YES
SIM Card will be detected.
- 80 -
YES
Replace J301 or
check soldering of components
NO
Change the main board
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