I can't send an sms/text from iphone 4S (iOS5.01)

I have a similar problem, but none of the suggestions above are working. I'm living abroad (using a sim card from abroad) and trying to send text messages (to an android user, who never had an iphone/imessage). My iphone seems to remove the country code before sending the text, which means the messages don't go through. I have tried deleting the contact and typing the number in manually, turning off the imessage option in settings, turning off dial assist - nothing works. Any ideas?

Thank you! Thank you! Thank you! I was about to launch my phone into outer space! Lol...

Thank you so much genius!! IT FINALLY WORKS!!

I have the same problem too. Residing at US but i came from different country. But i can use my phone to send a message and receive messages through my roaming number. (it cause more from my country to send to US) Now i am using iphone6 with t-mobile carrier - (samsung s4 before with t-mobile network). when i was using samsung i can send as many as i can no charges. It is because i can edit the phone number (my country 12 digits no space) but on iphone it auto-corrected for spacing your numbers.

This was such a simple solution and worked perfectly. Up until then I had blundered around checking settings, wifi link and more. I am not daft but am over 70. Like everyone my age we did not grow up with these devices, although we use them. For people like me it is not 'obvious' what to do. I think, if only there were some basic instructions when one first got an iPhone, telling people simple stuff like that (I.e where to type for an SMS message) , a lot of frustration could be avoided. Peter

Hi i had this problem i went to Optus first chand over the sim card kept the number now working have a go cheers Allen

Hi i would like to book some space for the trip to space for my iphone 4 , iphone 5 and i pad cheers, were not alone with phone problems hope all good from now on Allen