IMO- voice and call rings only once with Lollipop Upgrade

Reshma_86

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Sep 18, 2015
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I am using IMO free voice calling software on Micromax Unite 2. After upgrading phone to Lollipop Version, IMO rings only once and then vibrates. Is there any way to fix this. This phone is used only for internet calls. I am not able to see any way to change the default ringtone of IMO software as well. Please help.