help with samsung galaxy mini GT-S5570I

Hello to all, I present my nick is the resu
If the issue is not here and open the correct forgive me is that Im new
my problem is i have samsung galaxy mini to repair that has this problem
Up at the top right which indicates the network coverage goes a circle Along with a line in the middle
I looked IMEI is correct and I have a few tom Flashed stock and still the same
thanks in advance
a greeting