I am used so many video calling apps like skype, we chat, tango, etc but IMO gives me best video calling experience. IMO provides you best quality of video and sound. It’s also work so good in 2g network. IMO is so easy to use.
Voice calling quality is also best. Skype use your too much data blalance but IMO use your too low data balance. If you want best video calling experiance just download this app from play store and connect your mobile with wifi or 3g network for better result.