Samsung galaxy S2 GT-I9100 No Service no network Not Working Solution

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Samsung galaxy S2 GT-I9100 No Service No Network Not Working Solution Schematic Circuit Diagram

Samsung galaxy S2 GT-I9100 No Service No network Not Working Solution Step By Step

Step 1

Check memu setting

Menu → applications → setting → wireless and network →

mobile networks → network mode → setting is auto mode ?

Step 2

Menu → Phone → Keypad →
*#1234# → check Phone version →
PHONE : I9100XXXX or

PHONE : unknown

Check the connection of RF coaxial cable

(QCB01 @ page2 )

Step 3

Check the CP_VSD1,CP_VSD2_1.8V
CP_VSD1 (C351) =0.9~1.4V

CP_VSD2 (C353) = 1.8V

Replace the UCP300

Step 4

Check VREF

VREF ( C360) = 600mV

Replace the UCP300

Step 5

Change the board

Step 6

END

Unofficial Support Site For This Phone By welcome Zone Haldwani 

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