I bought a Verizon 8X because it's unlocked, and I took it with me overseas and put in another SIM card. I am able to make phone calls and go on the Internet; the only thing I cannot do is SMS and MMS. When I go into settings to add Internet APN or MMS APN, it does not save my settings. Can somebody help me figure this out? Am I missing something, or is there a Verizon restriction even though it's unlocked?