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

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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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