How to fix call sounds on samsung galaxy







 instruction
1,go to dial pad,type this belowe code and pass word 
2,network seting=>network mode=>select gsm all ok

Model: K Dial = 319712358 and enter the password 774632.

 Model: S Dial = 319712358 and enter the password 996412

 Model: L Dial = 319712358 and enter the password 0821
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