I just recently switched from my grandfathered unlimited plan to the 40GB Mobile Share Promo plan. But, when I go onto the Apple website (considering getting the kid a new phone), it doesn't give me the option to stay on the Mobile Share 40gb plan if I choose to "upgrade" a line. It just offers some strange data/voice/texting plans that have nothing to do with the mobile share plan I have. If I decide to choose "add a new line", it gives me mobile share options, but none include the promo, and there's no way to tell it to just "add the line to the existing mobile share account". So, how do I order from Apple and not mess up my plan?