yeah i'm having some problems with my sim card .its not working on my blackberry but working on my nokia ..but sometimes when i use it on my nokia it says insert sim 'i have tried another type sim on blackberry and it works fine
Given what you describe, I would deduce that your Cell C sim card is damaged, defective, or otherwise unsuitable. Replacement would be advised.
Occam's Razor nearly always applies when troubleshooting technology issues!
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