Can I keep my phone numbers?

I have three SERO lines of service with a contract end date of May 2011. Now that I've seen the EVO I want to upgrade to a Family Share plan but I don't want the extra year on the contract. If I add the Family plan first, can I have the numbers transferred from the SERO lines to the Family plan lines before getting rid of the SERO lines?

If I can retain the numbers, then I'm looking to sell all three lines of SERO service ($75 each or all three for $150). If my only choice is to upgrade the lines and keep the one year remaining on my contract, then I guess I'll have to go that way.

Does anyone know if selling the SERO lines and retaining the phone numbers is possible?

---

› See More: Can I keep my phone numbers?

If your account is clear, you should be able to keep your numbers.
CLEAR = NO CONTRACT OBLIGATION; NO MONEY DUE