If you own a Blackberry that has been unlocked you can find Blackberry SIM card plans for your handset. All newer model Blackberry phones can accept a Blackberry SIM card. This is because all newer model Blackberry phones are GSM capable. In order for a phone to be able to use a SIM card it needs to be GSM capable.
You may notice that a Blackberry SIM card plan can cost more than other plans.
This is true for some networks but if you are willing to forgo some features such as internet access this can affect the price that you will pay for your phone. The good news is that a Blackberry can often use data much more efficiently than other mobile phones can which means that you can access data and get what seems like more bang for your buck.
If you are interested in using your Blackberry on a SIM only plan it needs to be unlocked so that it can use the SIM cards that are provided by the different networks. If you do not want to pay for an unlocked phone you may want to use your handset and have it unlocked later by a third party. This can be a more affordable option for many people. If you dont mind paying up front you can often buy a phone online that has not been locked by a particular network.