Samsung galaxy S4 I9500 No Service,No Network Not Working Solution

Samsung galaxy S4 I9500 No Service No Network Not Working Solution Schematic,Diagram,Circuit

Samsung galaxy S4 I9500 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 : I9500XXXX or

PHONE : unknown

Check the contact of antenna.

(Sub FPCB)

Step 3 

Check the CP V_BAT

L300,L301,L302,C300 = 3.6~4V

Replace the L300,L301,L302,C300

Step 4

Check the CP_VSD1,CP_VSD2_1.8V
CP_VSD1 (C352) =0.9~1.4V

CP_VSD2 (C353) = 1.8V

Replace the UCP300

Step 5

Change the board

Step 6

END

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