What smartphone can I use with my old, existing AT&T plan (blue plan)...

  • Thread starter Thread starter JmaN
  • Start date Start date
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JmaN

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...without being forced to change plans? I have the old AT&T plan (blue) and would like to change phones. I've heard of people using some new smartphones without changing plans but not sure how to go about doing it. What phone(s) can I buy, how do I set them up, and do I only need to subscribe to mmode?
 
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