I recently purchased a used Maxx, and it was factory reset on arrival. Whenever I try to make a phone call, the phone application hangs, and eventually crashes and closes. If I soft reset, I am able to make the phone call, but then a second call later that day requires another restart. I am looking for any help with this as a known issue. If not, I will factory reset the phone and try again. It is very annoying. Other than this issue the OS and other apps work fine.