Worst Manufactured Phone Hisense F20

I bought two of these phones in 2016 and it started giving problems not even a month later! It is a costly mistake I will never repeat again. I've missed so many important calls, as the phone does not allow me to answer; the phone automatically just switches off without you doing anything; you wait forever for an app to open; most of the time it just freezes and pops up saying system not responding.. Your apps never respond...There were emergencies and I wasn't able to make or receive a call; it does not pick up the network clearly; the list just goes on and on... Both my husband and I experience the same problems with these phones. I would like to urge consumers out there not to buy a Hisense F20, it is the worse phone ever.