i bought a w850i off ebay, it was locked to three i bought a 3 sim card now it says INACTIVE USIM, can someone help, luckily i didn't pay a lot of money for it.

I had that kind of problem b4 with w85oi.... Here's what you can do. You know where you put your sim. Try to insert it properly. you must hear a "click" which mean u have properly inserted your sim card. I am just not sure if i had a same kind of error message saying "sim inactive" I forgot what exactly the error message but something to do about the sim card...note: ur nail must be long to put the sim proprely...its funny but true.

Good phone, i have one too =D

I believe you need a combonation to unlock it. Contact the person you bought it from on ebay and then see if they still have it. If not give him or her bad feedback.

i have one too an exellent phone, why don't you take it in to carphone warehouse and see what they say. if it doesn't work get in touch with whoever you bought it from off ebay.if they're a good person they'll help you with it.