iMessage & FaceTime problem in iOS8 (Singtel)

[mm]

Hi just check by changing the SIM card will activate immediately?

After you change your sim. Need to wait like 30mins to activate. Thereafter I turn off iMessage and FaceTime. Did a network reset.turn on iMessage and FaceTime .after few mins the iMessage was activated

 

[Cancer_Lim]

After you change your sim. Need to wait like 30mins to activate. Thereafter I turn off iMessage and FaceTime. Did a network reset.turn on iMessage and FaceTime .after few mins the iMessage was activated

Thanks for the help. Just changed a new SIM card and it works ........

 

[crystalnox]

I don't see how the SIM card could have cause the problem though.

 

[lufu]

I don't see how the SIM card could have cause the problem though.

It's a mystery but personally I spent hours reseting and restoring but couldn't fixed the iMessage issue. Changing SIM card apparently worked

 

[laucm]

Faced the same problem when I swapped out Australia sim card with my Singtel card after I came back from my holiday
Tried all methods - but can't get the imessage to work
iMessage keep showing my Aust number (grey out)

Finally found a solution:
Sign off from Apple ID in iMessage and Facetime
Turn off iMessage and Facetime
(I gave up and leave the setting off for 1 day. Switch off the phone overnight. Not sure if it helps)

Wake up in the morning.....
Reset Network Setting
....Phone reboot....
Contact App> add myself as a contact with my iPhone number (must add it as an iPhone number, not work or home, etc)
Setting > Mail, Contacts, Calendar > My Info. Select myself in Contact
Turn on iMessage. Sign in Apple ID
Turn on Facetime. Sign in Apple ID.
iMessage activated almost instantly