• Your T-Mobile SIM card will work in any T-Mobile branded phone, however, if you want to use a T-Mobile Blackberry, you need to change your Sidekick data plan to a Blackberry data plan, otherwise, you will not be able to use any features other than voice and text messaging. To use any data features like internet access, email or picture messaging, you must have a Blackberry data plan on your account. Thanks. SukiSue

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