Unable to send text messages to one number
I am wondering is someone knows of a way to fix this problem: I was in Mexico and used my phone there to text a few people back here in the States. When I returned to the US, I tried to send a text to one of those same numbers and I received the following message as a bounce-back text from this number : 121611611 "Error Invalid Number. Please re-send using a valid 10 digit mobile number or valis short code". The phone number I was trying to text appeared in the bounce back text message as a US number (which it is) but with the 52 country code of the US (that one uses when making international calls) in front of the area code.
Can anyone help me fix this issue?