Invalid SIM

Edwin Walker

Member
Bronze
Oct 10, 2014
49
2
8
#1
Hi all.
My 4S keeps displaying 'invalid sim'
Any ideas.
 
Dec 15, 2008
5,386
340
83
28
Pensacola, FL
#2
http://support.apple.com/kb/ts4148

  1. Update your iPhone to the latest version of iOS.
  2. Turn airplane mode on and then off again.
  3. Restart your iPhone.
  4. Check for a carrier settings update. Go to Settings > General > About. Install any available update.
  5. Remove the SIM card and make sure that it's a valid SIM that your carrier provided. Also make sure that it's not damaged, worn, or modified. Then reinsert it.
    A SIM tray that comes with one iPhone model won't necessarily work with a different iPhone model. When you insert the correct SIM tray, the SIM tray should be flush with the device.
  6. If you have another SIM card, insert it. You can use a SIM card from any phone with the same format as youriPhone SIM card. If your iPhone works with that SIM card, contact the carrier that issued your original SIM card.
  7. Restore the iPhone.
If you still see the issue, contact Apple support.
 

Edwin Walker

Member
Bronze
Oct 10, 2014
49
2
8
#3
I don't want to update to ios8. It made my last 4S very slow
 

Edwin Walker

Member
Bronze
Oct 10, 2014
49
2
8
#9
Had sim for years
The had a fall few days back. Had it repaired with new screen and new screen protector put on it.
Since the repair I have been having this issue of invalid sim
 
Dec 15, 2008
5,386
340
83
28
Pensacola, FL
#10
As I've read on here before, maybe remove the sim and make sure no dust etc, then put back in.
 

Edwin Walker

Member
Bronze
Oct 10, 2014
49
2
8
#11
Did that few times. Even did a hardware reset. Then it was ok for 1 hour or so. Then back to square one
Maybe I should just consult the network provider
 

Edwin Walker

Member
Bronze
Oct 10, 2014
49
2
8
#13
K thanks but the more I think bout it. Or research it. It doesn't seem to be problem with device. So therefore I'll consult network provider.
 

Edwin Walker

Member
Bronze
Oct 10, 2014
49
2
8
#15
What do u know bout VPN ?? For iPhone and Mac Pro
 

Europa

Moderator
Senior Moderator
Dec 12, 2008
28,453
5,578
113
Utah
#17
Use a paperclip to eject the SIM tray and reseat the SIM card. It might have become misaligned. If that doesn't work, go to your carrier and get a new SIM card.
 

Europa

Moderator
Senior Moderator
Dec 12, 2008
28,453
5,578
113
Utah
#19
You know, I do frequent this forum from time to time. If I had any helpful input, I'd provide it. ;)

I don't usually post for posting's sake.
I don't know about you, but I don't ever reply to threads unless someone sends a bat signal asking for my help.