Question about Radio Shack fine print

[Clocks]

Thinkign about getting my g/f the epic at radioshack now that her contract is up.

If we get her either an upgrade or new contract price (she doesnt care about keeping her phone #), and then "combine" our two accounts into a single Family Share plan, will radio shack charge us extra later on based on the fine print...

Discounts will be invalid if the original rate plan selected is changed to a lower monthly service rate, or if equipment is transferred to another line of service