phone from rogers shows "unregistered sim"?

[V3$tR3B3L]

i bought a motorolla KRZR and it came with a SIM card in it. i kept that Sim card because i was using one already. just recently though my phone said SIM blocked (my sister was playing with it) but no worries, i put in my new sim, popped it in and started it up. now it says Unregistered network. is there any way i can "register" it to rogers?

[Unregistered]

you have to call the company and ask them to regester the sim card to your account.and then it will work!
I work at roger in the cell phone departement and i know this for a fact!

[Unregistered]

I bought a m900 bag phone that hade a sim card already in it. Can i use it or do i have to buy a new one? When i turn it on it says unregistered sim card.

[Unregistered]

hey ive have my mtrla razor for over a year now n i havent put minutes on for a good 6 months n now its sayin unregistered sim do i havto buy a new sim card or could i get it registered for a little fee ?