No sound Weill video calls?

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http://forums.androidcentral.com – Does anyone have this problem or know a solution? With Skype and google+/talk video calls have no sound in or out sometimes, it seems to happen more when I used a viper to call a viper but that could be a coincidence. I googled it but didn't find any solutions. Sent from my A100 using Tapatalk HD (HowTos)