Table of Contents
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CHECKING FLOW
START
Does the SIM cards
supports 3V ?
YES
Voltage at pin1 of
CON401 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 output
NO
of VSIM LDO
Is 2.85V?
NO
Replace U201
NO
Redownload SW.
Does it work
Properly?
YES
SIM Card will be detected.
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4. TROUBLE SHOOTING
YES
Resolder CON401
NO
Change the main board
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