I think putting the card in and out of your phone may have slightly changed the alignment of the card to the connectors in the phone - try entering the card either to the left a little or the right but i have a feeling contact is not being made from the wear and tear. Does the card work in another phone? if yes then definitely not the card... but the fact that you have tried to use 2 different cards im thinking its the phone :(
Answers & Comments
I think putting the card in and out of your phone may have slightly changed the alignment of the card to the connectors in the phone - try entering the card either to the left a little or the right but i have a feeling contact is not being made from the wear and tear. Does the card work in another phone? if yes then definitely not the card... but the fact that you have tried to use 2 different cards im thinking its the phone :(