If you are carrying a Blackberry Torch 9810 locked to a network provider you can get it unlocked at SimUnlockBlackberry.Com which provides unlock codes for any Blackberry model for just $9.99. Once your phone is unlocked it will work with all network providers SIM cards. Unlocking via unlock codes is a permanent unlocking solution, so if you unlock it once you will forever be able to use it on different SIM cards.
Think you are on a Business tour or on a holiday and you are carrying your Blackberry Torch 9810 which is locked to a network provider.In this situation you don't have any option but to use the phone on international roaming, which can cost you a lot. Instead if you have an unlocked phone you can insert a local SIM card and use the phone with fewer prices. An unlocked phone can save you a lot of money when you are in town as well. You will have the option to switch on to a network provider which has lesser tariffs.
Unlock Blackberry Torch locked to O2:
Unlock Blackberry Torch 9810 locked to any Network provider: