Separate names with a comma.
Discussion in 'iPhone 4S' started by Edwin Walker, Nov 1, 2014.
My 4S keeps displaying 'invalid sim'
Update your iPhone to the latest version of iOS.
Turn airplane mode on and then off again.
Restart your iPhone.
Check for a carrier settings update. Go to Settings > General > About. Install any available update.
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.
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.
Restore the iPhone.
If you still see the issue, contact Apple support.
I don't want to update to ios8. It made my last 4S very slow
So this is a new iPhone 4S? Are you with AT&T?
I'm in Australia. Network telstra
Possibly a bad sim card.
How. But was fine yesterday
Hopefully someone can help as well if I am not able to. I am searching online to help.
Is this sim card you have for Network Telstra or did you just switch?
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
As I've read on here before, maybe remove the sim and make sure no dust etc, then put back in.
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
I was hoping someone from here could provide support as well. Maybe? @Europa @Napoleon PhoneApart
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.
Let us know what they say and if you have any other issues.
What do u know bout VPN ?? For iPhone and Mac Pro
I only know what I search online for this in this case.
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.
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.
I only respond to the Kosh signal myself.