I just upgraded from a samsung propel to a samsung captivate using an upgrade on my mom's line. They sent a sim card with it but my mom had to use it with her phone and I'm still using my old one. They haven't changed me automatically to a smartphone data plan, even though they recognized online that I changed my phone. I'm still under the ten dollar data unlimited for family plans. Should I change my data plan to a smartphone one (they give the option for that online) our keep my old one? P.s I upgraded online, not in the store