So i recently just got a blackberry curve 8900 for tmobile, but i got it unlocked today so i can use it for at&t. Now the calls and everything else are working but i cant text? On at&t i have a unlimited texting plan but when i try to text a red X pops up next to the text & says pending . Now i connected it to my houses WiFi & the texts work. Heres my question, do i need a blackberry plan to text anywhere i go , or is it something that im doing wrong? PLEASE HELP!