hi
i have problem with my xperia Sl , after i update my phone to jelly bean, when every one call me , my speaker volume go on Up , i turn down the volume , but when i have call again , i have high volume again ! i dont know what should i do , i did factory reset but i have this problem again ! i have this problem only when i have call from keypad ! not in viber or tango and whats app ! when i listening music every thing is ok ! i have problem with increase volume suddenly ! and make me down 
please help me ! thx alot
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