Correção do texto "Usefull cell phone" [en>en]

Avatar do usuário draylson 15
Please, suggest corrections for my text. Thank you.

Usefull Cellphone

I’m impressed about how much usefull my cellphone has been for me. I think that the only functionality which I’ve been used is the clock. I avowed that I’m not used to make calls, but ever I need to make one I don’t have credits or the battery is uncharged.
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Avatar do usuário Flavia.lm 3925 1 9 88
Sugestão:

I’m impressed by how useful my cell phone has been for me. I think that the only functionality which I’ve used is the clock. I confess that I’m not used to make calls, but every time I need to make one I don’t have credits or the battery is uncharged.
Avatar do usuário Donay Mendonça 52185 21 84 1222
Complementando:

Mais algumas sugestões:

I’m impressed by how useful my cell phone has been for me. I think that the only function I’ve used is the clock. I confess that I’m not used to making calls, but every time I need to make one I either don’t have any credit or the battery is low.
Avatar do usuário draylson 15
Thanks!