dous

Hi everyone, i had recently purchased samsung galaxy y dous and its showing some signs of problem. 1- its balcklight keys does not seem to work. 2- i hear echoes while listening to music through my earphones. Kindly help me in this matter.

Guys i got a new Samsung C3322 dous 2 days back. It is good vfm phone. Buddies i cant install any jar file to it . After googling i found this : Enter *#52828378*# > Got some menu > then in OTA change the value of max jar file to 2048 Then save. I done all that but now i cant install...