I deleted IMO app from iPhone 6 and re-installed it, but I can't type my number. It's showing loading and that's it. What should be done?
There haven't been any reports regarding the loading loop for the iPhone version of the app. Most likely, the problem is on your side. Try removing the app, then simply re-install it again and that's it. Eventually, use another wireless network, because it's possible that connections to the IMO servers are not permitted, therefore making it impossible to reach the login screen.
App Store link: https://itunes.apple.com/us/app/imo-free-video-calls-and-chat/id336435697?mt=8