xperia arc s

[gabrielaaaaa]

hello! I have a problem with my xperia ars S. is without  sound in  speaker mode. help me please! But sounds the auricular when call me

[_alexdon_]

Check if the same occurs in safe mode:

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008