I have this trouble and after restore and new sim card I got a replacement Ipad that had a twisted sim-card tray. At&T store adjusted it and it was ok for a bit but now intermittent failure. Then I got a new sim card tray thinking it would be fine but again - - "no sim card" error msg. This is not fun and it's my third Ipad (first had some other issue and genius' gave me a new one. Because I'm at least 3 hours round trip to an Apple store I prefer to resolve things at home - - better yet -- not to have these erratic issues.
Apple needs to address this. Suddenly malfunctions and no restarts or re-sets make a difference. Will bet dollars to donuts they swap mine out. The second time as well. Had tom say goodbye to the engraving last time. Note to self: engrave the third party cover instead, it lasts longer!
Off to the store....
Apple did not want to help me with this issue, since I bought my Iphone with a third party ( that also refused to help). Now back tp HTC after this very disapointing iphone experience. It is too crazy for words that such an expensive device does not wotk properly and that there is no proper support when buying not with apple...
Same problem. 6 months of trouble-free use on my iPad 2. Then I started to get the "No SIM card installed" error.
Forced reboot helped, but the problem came back.
Switching in and out of Airplane mode helped, but the problem came back.
Removing then replacing the SIM card helped, but the problem came back.
AT&T replaced the SIM card which helped, but the problen came back.
Made a visit to the Apple Store. The Genius was very helpful. Basically reset my iPad 2 to factory condition then reinstalled the iOS in order to verify if software was the issue.
Problem came back, indicating a hardware issue.
Apple replaced the iPad 2, and I have not had the problem since. Of course I backed up the iPad before I took it to the Apple Store, so it was a simple matter to restore the new one from the backup.
The same thing happened to me after updating my 3GS iPhone to iOs 5. Not a very compatable OS with older devices. Apparently the upgrade sometimes wrecks components function like the sim card reader. Changing out the card doesn't resolve the problem. The apple answer is to change out the device.
This is only a partial fix; if you have them do the install the hardware becomes very buggy.
It does the same thing with iPad1.
It's a shame they failed to mention that with the upgrade
If you're on an older device resist the desire to upgrade.
Incidentally iOS 5.0.1 supposedly fixes it. It doesn't.
Interesting... this is the first thing that has worked for me, the switching into Airplane Mode and back. I've had consistent "No SIM" for about 2 months after a year and half of no trouble at all... this little fix is the first thing that has restored it at all.
I fully expect that the problem will recur, however - Apple, you guys HAVE to get on top of this one!
I have an iPad 2 bought in September - just bought a sim this week and got the dreaded sim problem too. I updated to 5.01 to no avail. I have replaced the sim with Telstra and same error happens. I am hoping this is fixed in 5.1 update - whenever that comes. I wish I had a sim when I was on 4.3 to see if it happened back then so I would know if it was ios5 related.
The only thing I can do to get 3G back is to reboot and then it will drop out after a half hour or so. Funny thing I noticed after a restore was that it worked fine for a whole day until I downloaded apps from the app store. Then it went to SOS only. I think it's the same bug that the 4s has. Pitty they didnt give us a tweaked update.
I wrote in awhile back about a repeated "no simcard" (on two Ipads) and the issue was repeated in an Apple store and when they took my IPad out of the case, they found an amazing warp---from heat (I keep it in their black case in an insulated fabric case. Two Ipads I had manifested this no sim issue in the summer. (I don't leave it in my car for any length of time, or in the sun) They replaced my Ipad with a brand new Ipad 1 (not refurbished as AppleCare may have done) and all has been fine since----that was the day after new operating system was launched and we did all the upgrades in-store during a one-to-one/personal projects session.
It was a very long day but it's all good. There have been some heat issues with Ipads--I googled around and learned.
As an OLD IT guy, I'm suspecting that this is probably a software problem of some sort. After reading the entire thread, there seems to be no specific fix to this. I've had iPAD 1 since beginning, and the No SIM thang just started last week. No pattern, usually self-correcting. Initially, I tried reboot. I tried cleaning SIM. I swapped SIMs. Did the Airport on/off. Just used WiFi at home - SIM came back.
Again...no pattern, no specific fix. But I've always gotten back to normal ops somehow.
First, this problem was intermittent for me. I went through a long series of troubleshooting steps, including replacing the SIM card.
I won't claim to speak for everyone who has this problem - but in my case it was DEFINITELY a hardware issue and had a specific fix.
When I took my iPad 2 to the Genius Bar, Apple was very careful to eliminate possible software issues.
Ultimately, we reset to factory configuration, and downloaded a "fresh" copy of iOS. The problem happened again a few minutes later.
Apple was convinced this was a hardware problem and promptly replaced my iPad 2.
I had a similar situation to Jim Warthman, above, and had my first iPad 2 replaced by the Genius Bar. Now, after having my 2nd iPad 2 for a few months, I just started to get the "No Sim" error again. So far, one flip of the Airplane Mode switch leads to an immediate ATT 3G connection, but I fear that it will get worse, like with my first one that was replaced.
Some other people in this thread have mentioned that their cases may have caused issues. I have the Apple-produced folding-screen cover that attaches to the side of the iPad 2 magnetically (and very near the Sim card). Does anyone with "No Sim" errors utilize this cover? Then again, don't know why if it's the magnet causing the problem, that it's taken a few months for the "No Sim" error to appear...
This is surely a defect. Why Apple guys haven't done anything?! Flight mode switching could sometimes get the connection back but not always. A new SIM wont help. Try using a hair dryer to warm up your IPad2 near the SIM slot area. I guess this is all about the connecting plates problem at a cold environment.
I have logged the case with Apple support.