my cellphone is dead...

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welcome back... i think i already said that my cellphone is dead...if i didn't do it ... Now is the moment... i one day my best friend didn;t have battery at the phone... As a good friend what i am... i strucked his sim card in my phone to call a girl...(To be honest i did that for the girl not for my friend...) After i called her i put back my sim card but the phone didn't open. A red color was blinking on the ira (infrared). someone told me that the problem my be from the erom and he gave me a program to update my erom.I couldn't repai my phone because the battery was empty.I implored a girl to charge it for me.She charget it but i didn't repair it because the program didn't recognize the phone... what can i do to repair it because i don't want to go at service...?