Why do I have TWO phone numbers connected to my iphone?

Okay so I transferred from a blackberry to the iPhone 4S back in February. However I wanted to keep my old number bcoz if convenience, so I called the AT&T ppl and they apparently transferred my old number from Tmobile to AT&T. But when I started texting ppl, they said that were receiving texts from two different numbers. When the text bubbles showed up in green, the 4G network was off ( from my old number that I want to keep) and when the bubbles are blue, the cellular network or the Wi-Fi is on, which is connected to the new number which I thought I had replaced. Please tell me what to do if I just want to keep the old t-mobile number!

Woah thats strange you should call your provider

This is called an incomplete port. It is an issue on AT&T's part. Call them up and say there was an issue with the port of the new phone number and that they need to complete it. Explain what you posted here about the issues with the texting.

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