iphone 4 unlock for tmobile tethering?

I unlocked a version 4.0.2 iphone 4 recently by jailbreaking>ultrasnow>inserting cut/micro SIM card. It works fine however I dont have the little icon on the left to send photos or recieve photos. I can't facetime either when i activate it on setting>phone>facetime it stays at "awaiting for activation". And also whenever i reboot or turn off my iphone, I get no service and it says no SIM so i have to keep reinstalling ultrasnow. Any fixes for these problems would be great. Thanks again!
 
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