It has been reported that iPhone 4S may not recognize a micro-SIM card. This may result in receiving an error message stating “No SIM Card installed” or “Invalid SIM”. This bug has been fixed by the latest iOS version. If you encounter this problem, you should update to iOS 5.1 or later.
Obsessed with tech since the early arrival of A/UX on Apple, Sudz (SK) is responsible for the editorial direction of AppleToolBox. He is based out of Los Angeles, CA.
Sudz specializes in covering all things macOS, having reviewed dozens of OS X and macOS developments over the years.
In a former life, Sudz worked helping Fortune 100 companies with their technology and business transformation aspirations.
iPhone 4S running on 5.1.1(9B206), I have the same problem since the last two days. Many SOFT reboots, back-up- restore options, have not helped. I get this message at-least 5 to 6 times a day. It is a really painful. Any support will be great.
My iPhone 4S running on 5.1.1(9B206) and it just had this problem. A soft reboot (hold down the power switch and home button simultaneously) fixed it. I then got a ‘SIM Failure’ error message. Verizon rep says not to worry, SIM card is not used in US, is for travel outside US. Phone now seems to be working OK.
Everytime I pull up my mail it said cannot connect server failed what do I do
I get no service very frequently on my iPhone 3GS it’s iOS is 5.1
The signals come for a moment then no service appears
Someone please help!
Ps I’ve been having this problem for a month
I also have the same problem with my ipad2 3G. I installed cydia to get blobs then downgraded to ios5.1.1 and it worked for ipad..
Same problem my iPhone 4 shows “no sim card installed “. What happen please give me solution
My problem also the same, but it is on my ipad2. How can I deal with it?
iPhone 4S running on 5.1.1(9B206), I have the same problem since the last two days. Many SOFT reboots, back-up- restore options, have not helped. I get this message at-least 5 to 6 times a day. It is a really painful. Any support will be great.
Same phone, same version of OS, same problem. Wish I’d stuck with Android.
hey
my iphones 3gs and i have on it 5.1.1 but typed no sevices please advice i have 6 days till now on this problem
your’s
islam
My iPhone 4S running on 5.1.1(9B206) and it just had this problem. A soft reboot (hold down the power switch and home button simultaneously) fixed it. I then got a ‘SIM Failure’ error message. Verizon rep says not to worry, SIM card is not used in US, is for travel outside US. Phone now seems to be working OK.
not completely fixed in latest firmware, had the No Service problem after coming out of airplane mode yesterday. Had to restart phone to fix