having trouble with my new straight talk t-mobile service! phone is nexus 4 version 4.2.2 st t-mobile activated online on the 13th feb. and sms/calls were working fine until today! *albeit mms was spotty/delayed and data was slow (could be my area). *perhaps someone have dealt with this before and could advise what to do or say to a rep to get a fix a lot quicker. anyway as of the moment: - cant make calls *goes to call ended from dialing as soon as i dial a number/contact. - cant receive calls *goes to voicemail - mms/data has been spotty/slow ever since activated. today it's just crawling to a halt! - sent an sms just now and it worked. received it on my virgin mobile phone. so far im not liking st t-mobile service... seems like the service is unreliable in my area. :/ but it could just be straight talk and not t-mobile as i have some friends with t-mobile postpaid and they're service seems to be just fine.