how do i restart a Quick Start transfer that was interrupted when the new phone was accidentally unplugged from power?

Quick Start supposedly can only be done via a new setup, whether that's factory fresh out of the box or restored to factory settings. I believe they usually recommend that both devices are connected to power, so I'm thinking there's no way to restart when it's been interrupted by powering down.

If you don't mind answering, how long was it taking, and about how much data?

JM641 wrote:

~45GB, and overall process was probably at about 90 mins. I unwittingly unplugged the new one when it asked me to sign in under appleID....it said once i did so data would continue to transfer in the background....didnt realize that the new phone had to stay plugged in. as i said, old phone is quoting ~6mins remaining but showing no sign of a restart.

Thanks for the info. Do you need to do it via Quick Start? It might be easier if you've got a PC or Mac to do it, although 45 GB of data can be pretty slow at USB 2 speeds over a Lightning cable.

Maybe consider restoring the new iPhone to factory settings and then backup you old iPhone to a computer, then set up the new iPhone from the backup. But it would require a lot of available storage on a computer. Or you could just restore to factory settings and try Quick Start again. Not sure how to safely get your old iPhone to stop thinking it's performing Quick Start though. Is there a cancel option?

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Use the Finder or iTunes to transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch - Apple Support

Do you use an eSIM on your old iPhone? If YES, then it will transfer with your Phone number. If you do not use an eSIM on your old iPhone then you can simply transfer the SIM card from your old iPhone to your new iPhone. There is only one way to establish a Quick Transfer so even if you start over again, then you won't miss anything.

On the other hand, If your new iPhone continues to complete the data transfer, and, after some time, you can confirm that everything has transferred and take things from there.

Axel F.

Can you get to the Home Screen on your new iPhone? If YES, the open Settings ➡️ General ➡️ Transfer or Reset iPhone ➡️ Erase All Contents & Settings ➡️ Continue: This will return your new iPhone to factory settings and remove all data that was previously installed. You can then repeat the process of ➡️ Using Quick Start to transfer data to a new iPhone, iPad, or iPod touch

Axel F.

Apps aren't really transferred and haven't been for some time as they're now only loaded via the App Store over the air.

There might be a lot of junk that's stored but doesn't get transferred. For whatever reason, iOS can be slow in its garbage collection where it should clear out temporary files (that don't get backed up and don't get transferred).