does not work, no signal

I got this phone for my elderly mom. I had metro pcs, it did not work with it, so I changed it to T Mobile , the same thing. It does not work all the time. when you look at the phone it may show t-mobile which is good or it may say 'no sim card'. so you never know when it works, the problem is that it may not work when she needs it the most. other problems are inserting the sim card, after couple of times, it does not stay in place, now I can not even insert the card and keep it there. other issues are typing names in contacts, it inserts words as soon as you press a key, spent hours with no luck, so if you press "m", it will give you mary, mile, man,.......... and so on. I could not disable that stupid feature, so unreliable signal and poor features, makes this phone a junk.

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