New simcard, no imessage

[lidlund]

I returned my iPhone 4s to the store today due to some warranty issues.

I have my 3gs as an backup phone but i cannot send imessage from my iPhone :O

I can send iMessage from the iPad, but not the 3gs (or not on the 3gs after i changed simcard)

Anyone have any ideas?

 

[bob616]

Try going into the iMessaging settings and turn it off and then on.

 

[lidlund]

Try going into the iMessaging settings and turn it off and then on.

Done, but no diff.

Tried several times.

 

[ronaldmathies]

Done, but no diff.

Tried several times.

Go to Settings -> General -> Reset -> Reset Network Settings

iMessage uses a combination of device id and sim card id to make the it unique, resetting the network settings solves this problem (i had the same problem)