I am in the US. I have signed up for the unlimited calling and texts add on for the US. I am unable to send text messages. I am able to send iMessages when connected to WiFi. I have reviewed the Apple guidance and no change. Have also powered off my iPhone 5 with no luck.
Still no luck texting in US. Have US talk and text add on for an iPhone 5. can make and receive phone calls. T Mobile carrier shows on the phone. have connected to T Mobile manually. have rebooted the phone a number of times. only able to send texts using iMessage when connected to WiFi or when data is turned on....don't want to incur data charges.