I have a current/existing account with Straight talk, and need to set up my new BLU Advance 4.0, how do I do this?

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AC Question

I have a current/existing account with Straight talk, and need to set up my new BLU Advance 4.0

1. I did not purchase a new sim for the BLU. Do i need to?
2. I would like to do the set up myself based on peoples comments of overseas customer service at ST. I'm hard of hearing and if i cant read your lips i don't know what your saying. They also said it took weeks just to figure out how to change the APN.