Handing Your Old iPhone Down to Your Kid (the Safe Way)

You upgraded your phone, so your old one becomes your kid's phone. It feels like it should take twenty minutes. I do this for a living, I'd done it before, and it still took me three and a half hours with a couple of dead ends that made me want to throw the thing. Here's the version that takes an afternoon.

BrianIn most families this kicks off a little chain reaction: the newest phone comes to you, last year's phone moves down to one kid, and that kid's old phone moves down to the next. Each hand-down is the same handful of steps, so once you've done it once it stops being scary.

Do it top-down, one phone at a time

Each phone you set up frees the one below it.

1. Set up your new phone. Pull your data (Quick Start) and move your number (eSIM Quick Transfer) from your old one.
2. Confirm your number works on the new phone (make a call with Wi-Fi off) before you touch the old one.
3. Only then erase the old phone and hand it down. Repeat down the chain.

Never wipe a phone until you've confirmed the line moved up. That's the rule that keeps you from stranding someone without service.

Lock it down now, not later

The best time to turn on supervision (the real control layer, see the supervision guide) is during the fresh setup of a wiped phone. If you hand it over, let your kid set it up, and try to add controls afterward, you have to wipe it and start over.

So supervise it while it's already erased and in your hands. The full step-by-step is in the lockdown playbook; this post is about doing it as part of the hand-down so you set the phone up only once.

Before you erase the old phone (the checklist that saves you)

• Confirm the number is live on the new phone with a real call.
• Open your authenticator / 2FA app on the new phone and confirm your codes are there.
• Signal: migrate it before erasing (it needs the old device).
• 1Password, passkeys, and iCloud Keychain are cloud-synced, so they come back on their own.
• Car key (Tesla, etc.): not synced. Re-pair at the car and delete the old phone's key.
• Erasing while you're still signed into iCloud clears Activation Lock for you.

Two mistakes that cost me real time

1. Restore during setup, not after. Signing into iCloud at the home screen is not a restore. The actual restore only happens during Setup Assistant, at the Apps & Data screen. I missed it, got a blank default layout with none of the apps, and had to erase and redo the whole phone. Choose Restore (or Quick Start from the old phone) at the Apps & Data screen. Don't sign in afterward and hope.

2. "Provisional Enrollment failed" means no internet. When you supervise via Apple Configurator, the phone needs its own Wi-Fi (it can't borrow the cable's connection), and if you already moved the eSIM off, it has none. The fix that took it from failing-for-minutes to done-in-thirty-seconds: at the Hello screen, step into setup just far enough to join Wi-Fi, stop there, then start Prepare again. See more details in the supervision guide.