A phone going in for repair is a phone you may get back wiped, and one that will be unlocked and in a stranger’s hands in between. Both are manageable, and both are much easier to handle before you hand it over than afterwards.
The short answer
Back up and then verify the backup by checking a recent photo on the web, not just by trusting the app. Then decide whether to hand over your passcode: many repairs require it for testing, and if you provide it, assume everything on the phone is accessible. Sign out of your account and remove device locks so the repairer is not blocked, but only after the backup is confirmed.
The backup comes first
Repairs frequently involve a factory reset, and sometimes the phone does not come back at all if a fault turns out to be terminal. Neither is a disaster if the backup is good and a serious problem if it is not.
Critically, verify it rather than trusting it. Open your cloud service in a browser on a computer and confirm a photo from this week is actually there. The phone app shows local and cloud content in one view, which makes an incomplete backup look complete.
Back up everything and verify it
Run a full backup, then check on a computer in a browser that recent photos and files are genuinely there. Verification is the step people skip and the one that matters.
Back up things the cloud does not cover
Two-factor authentication codes are the big one: if your authenticator app is not backed up, a wipe locks you out of accounts. Export or transfer those deliberately. Also check messages, call history and app data that syncs separately.
Note your authenticator accounts before wiping anything
Write down which accounts use the authenticator, so if the worst happens you know what you need to recover rather than discovering it one login at a time.
Remove the SIM and any memory card
They are yours and they are easily lost. Take them out and keep them.
Decide about the passcode
Many repairs require the phone to be unlocked for testing, and a repairer who cannot turn it on cannot verify their own work. If you provide the code, assume everything on the phone is accessible. If you would rather not, ask whether the repair can be done without it and accept that testing will be limited.
Sign out of your account and turn off device locking
Activation locks tied to your account prevent a repairer setting the phone up and can block the repair entirely. Sign out properly after the backup is confirmed, not before.
Consider wiping it if the repair is major
For a screen or a battery, usually unnecessary. For a board-level repair or anything taking days, a wipe after a verified backup removes the question entirely and you restore when it comes back.
Photograph the phone before handing it over
All sides, including any existing scratches, and the screen powered on. It takes two minutes and it settles any later disagreement about condition.
Authenticator apps are the thing people lose most often in a repair. If your two-factor codes live in an app that is not backed up, a factory reset locks you out of every account using it, and recovering can take days per account. Deal with this before the phone leaves your hands.
The privacy question
There is no way to hand over an unlocked phone and retain privacy over what is on it. Reputable repairers have policies and most staff are professional, but the honest position is that an unlocked phone is an accessible phone.
The options, in order of how much they protect you:
- Wipe it after a verified backup. Complete protection, and you restore afterwards. Best for long or major repairs.
- Provide the passcode but remove sensitive apps first. Banking, work email, photos you would rather not share. A middle ground.
- Provide the passcode as is. Convenient, and assume access.
- Withhold the passcode. Most protective, and the repairer cannot test their work, which sometimes means they will not take the job.
Ask the repairer directly what they need and why. A good one will explain exactly which tests require the phone unlocked and will be comfortable with you wiping it first. An evasive answer to that question tells you something useful about where to take your phone.
Things worth checking about the repair itself
- Will original parts be used? On some phones, non-original parts disable features such as face unlock or produce persistent warnings.
- What is the warranty on the repair? Get it in writing, including what happens if the same fault returns.
- Will it affect the manufacturer warranty? A third-party repair often voids what remains.
- Will water resistance be maintained? Usually reduced after any opening, and rarely restored to the original rating.
- Do they have your contact details and a reference? Get a written job number.
When you get it back
Before leaving, check the repair actually worked and that nothing else has changed. Test the cameras, both microphones, the speakers, wireless charging, face unlock or fingerprint, every button, and the signal. Connector problems introduced during a repair are common and much easier to raise while you are still standing there.
Do I need to back up before a screen repair?
Yes. Screen repairs do not usually require a wipe, but they sometimes do, and a phone that turns out to have a deeper fault may not come back at all.
Should I give the repairer my passcode?
Many repairs need it for testing. If you provide it, assume everything on the phone is accessible. For a major repair, wiping after a verified backup removes the question.
What is most commonly lost in a repair?
Two-factor authentication codes, because the app is often not backed up and a wipe locks you out of every account using it. Deal with that first.
Will a third-party repair void my warranty?
Usually what remains of the manufacturer warranty, yes. Weigh that against the cost difference, and ask what warranty the repairer offers on their own work.
What should I check when I get it back?
Cameras, microphones, speakers, wireless charging, biometrics, every button and the signal. Connector faults introduced during a repair are common and easier to raise before you leave.
The bottom line
Back up and verify it on a computer rather than trusting the app, and deal with your authenticator codes specifically, because that is what people actually lose. Decide the passcode question deliberately rather than by default, and for a major repair wipe the phone after the backup is confirmed. Photograph it before handing it over, and test everything before you leave with it.
