bb 9800 torch

Hi there I have a bb 9800 torch which display the following message: mm6 SOS only ??? how can it be corrected?;;)

Call your carrier. Most likely, your phone serial number isn't registered on their network. Explain to them what's going on and they should be able to take you through a process to correct it.

This usually happens when people buy unlocked phones and try to activate them on their carrier's network. Is that what happened?

Thanx will try, bought phone as unlocked on all networks worked for about 5 min and then gave message....