Sprint 7700 dual sim very popular phone in bangladesh.Sprint 7700 dual sim ringer problem is very rear.But it is very necessary solution.So I make this solution. Now share sprint 7700 dual sim ringer solution.
How to do this work : If your phone's loud speaker is not work or low sound then check speaker,If speaker ok but problem still then check ringer ways following picture if ringer ways ok but problem same then rehot or replace ringer ic.
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