Nokia
NOKIA 2630 Phone hangs / halts

I have purcahsed 2 NOKIA 2630 phones. But there is a serious problem that phone halts / hangs frequently while receiving calls / after missed calls.

I am not sure what to do.

I have heard that there is a serious problem with NOKIA 2630 models as there are a number of similar problems.

I wonder why NOKIA is not taking any care about this problem. It does not look nice for such a big enterprise to tackle a problem this way.