Can't send text message to people that are not on AT&T/Cingular

iBookG4user

macrumors 604
Original poster
Jun 27, 2006
6,596
2
Seattle, WA
Ever since I've gotten the iPhone I haven't been able to send text messages to people who are not on AT&T/Cingular, but they can send text messages to me. Once I receive a text message from them then I can reply and it will get to them, but if I try to go to contacts and then text them, I get an error message saying its not a valid 10 digit number. I've tried both just their number, their number and area code, and putting one before their area code and number, all to no avail. It would be very nice to be able to text my family again who are on T-Mobile. Thanks in advance for any help!
 

Roy Hobbs

macrumors 68000
Apr 29, 2005
1,805
101
Ever since I've gotten the iPhone I haven't been able to send text messages to people who are not on AT&T/Cingular, but they can send text messages to me. Once I receive a text message from them then I can reply and it will get to them, but if I try to go to contacts and then text them, I get an error message saying its not a valid 10 digit number. I've tried both just their number, their number and area code, and putting one before their area code and number, all to no avail. It would be very nice to be able to text my family again who are on T-Mobile. Thanks in advance for any help!
Call at&t
 

MyJelleo

macrumors 6502
Mar 29, 2007
275
0
I've been able to send text messages to people with different carriers without a hitch.
 

AJsAWiz

macrumors 68040
Jun 28, 2007
3,252
342
Ohio
Ever since I've gotten the iPhone I haven't been able to send text messages to people who are not on AT&T/Cingular, but they can send text messages to me. Once I receive a text message from them then I can reply and it will get to them, but if I try to go to contacts and then text them, I get an error message saying its not a valid 10 digit number. I've tried both just their number, their number and area code, and putting one before their area code and number, all to no avail. It would be very nice to be able to text my family again who are on T-Mobile. Thanks in advance for any help!
I agree (with others' advice). Call AT&T. I can send and receive text message to everyone. Doesn't matter which carrier they are with.
 

unity

macrumors 6502a
Sep 30, 2005
926
0
Green Bay, WI
Well an invalid number would indicate you phone numbers in the address list are wrong. With what program are you syncing with? Is it Address Book?
 

iBookG4user

macrumors 604
Original poster
Jun 27, 2006
6,596
2
Seattle, WA
Well an invalid number would indicate you phone numbers in the address list are wrong. With what program are you syncing with? Is it Address Book?
I don't sync my contact list, nor do I even use Address Book. I entered them into my iPhone manually so I know that they are the correct number, I can call them just fine. I guess I'll call AT&T tomorrow after work and see if they can fix this.