I plugged my iPhone into another computer and it looks like I lost all my data. How do I undo this? I tried plugging it back into my default computer and it makes me register the phone. I don't want to lose all my data.
iPhone 4, iOS 5.1.1
After plugging your phone into the computer you normally sync with, click on restore, and then chose restore from your last backup. If you have not done a backup of your phone on your computer then you could be in trouble, unless you use iCloud for a backup and then you can just restore from there.
I will need a bit more info like what steps you performed when plugging into a new computer to help more
BUT the bad news is that typically when you plug a phone into another computer for the first time... that new PC will recognize that the phone is already synced with anohter itunes account and it will ask if you want to sync with the new computer AND in doing so ERASE ALL currently synced content in the process...
If this is in fact what you did you will need to perform a restore using the orig computer and a saved back up from either that old itunes computer or one from the cloud to get back to the content you used to have on the phone...
Again more details about what specific stpes you took once it was plugged into a new computer and why you did that will help too
I plugged the iPhone into the second computer to try and charge it but did not do anything else. Now it says 'Activation Required' and wants me to restore to factory defaults. Nothing else was done to the phone.
... After plugging it back into my default computer, it now it says 'Activation Required' and wants me to restore to factory defaults. Nothing else was done to the phone.
That's certainly odd... the activation being lost could have been a carrier issue or iOS software issue...
Was the phone already working and activated prior to this issue?
You may be stuck with having to restore...
By default iTunes or iCloud (whichever you have designated) will back up your content and settings... Content wise remember it's still always in iTunes even if you remove it from the phone...
If a back up was performed prior to you have this issue (either by iTunes or iCloud) then performing the restore will take a bit but wont cause you to loose anything as after the restore is completed iTunes will ask if you want to restore from a back up or set up as a new device... choose the restore from back up option and choose the most recent back up listed and it will then restore all your settings and content...
Keep in mind this will only be ture IF a back up has recently been saved in iTunes or iCloud...
In iTunes it's easy to tell... open iTunes and go to prefferences... go to the devices tab and it will tell you the device and last date/time of last back up...
Unfortunately I'm not aware of how to check to when the last iCloud backup was performed UNLESS you happen to have another iOS device already... another iPhone or iPad for example...
If you do, then on that other iOS device... goto Settings > General > Manage Storage (under the iCloud section) and it will show you any iCloud back ups youve done with any devices
I plugged my phone into another computer and seem to lost all my data. How do I undo it?
