Im having SAMSUNG GALAXY S2 i9100 (International - Factory Unlocked) mobile with Android 2.3.3 While on calls, im witnessing a AMPLITUDE STRIKE symbol on left of PAUSE button (Pls see attached screenshot). This happens only whn i use phone earpiece directly and the symbol goes away if i use SPEAKER. I verified withsome friends who use the same model, but they dont get tht symbol while on call. Anyone know why tht symbol comes? Im experience drop call prblm frequently. Whther tht symbol is related to tht prblm? Kindly help.