Summary

22 items · 30–90 minutes

Why Phone Transfers Go Wrong — and How a Checklist Fixes That

Most people discover what they forgot to transfer only after it's gone. A contact list that never synced, a year of photos left on an old device, or a two-factor authentication app that locks you out of your bank account — these are common, avoidable mistakes. The good news is that a methodical approach, rather than technical expertise, is all you need to get through a phone switch without data loss.

This checklist walks you through every category of data you need to protect, in the order you should handle it. Before you start, it's worth understanding your backup options. Our guide to cloud vs. local phone backup breaks down the trade-offs between storing your data online versus on a computer, so you can choose the approach that fits your situation.

Required

Cloud backup service

Automatically backs up photos, contacts, and app data so they can be restored on a new device.

Required

Password manager app

Stores and syncs your account credentials across devices so you don't lose access when switching phones.

Required

Authenticator app with transfer feature

Migrates your two-factor authentication codes from your old phone to your new one without locking you out of accounts.

Optional

USB-C or Lightning cable

Enables a direct wired connection for faster data transfer between old and new devices, or to a computer for local backup.

Optional

Desktop backup software

Creates a full local backup of your phone on a computer as a second copy independent of cloud services.

The Full Transfer Checklist

Work through each group in sequence. Skipping ahead — particularly to the factory reset — before earlier steps are complete is the most common cause of permanent data loss.

Backup preparation

Enable automatic cloud backup on your old phone and confirm the most recent backup completed successfully within the last 24 hours. Must
Connect your old phone to a computer and create a local backup using your platform's desktop software (iTunes for iPhone, or your Android manufacturer's PC tool) as a second copy. Should
Note your current operating system version so you can match or exceed it on the new device during setup. Nice to have

Contacts and calendar

Verify your contacts are synced to your Google account, Apple ID, or another cloud service — not stored only in your SIM card's local memory. Must
Export a .vcf contacts file to your email or cloud storage as a manual fallback in case sync fails. Should
Confirm that all calendar events, including recurring ones, appear in your cloud calendar app and not only in a local app. Must

Photos and media

Open your cloud photo library (Google Photos, iCloud Photos, or similar) and confirm the upload queue shows zero pending items. Must
Manually copy any photos saved in messaging apps or third-party cameras that may not sync automatically. Must
Back up downloaded music, podcasts, or audiobooks that you own and cannot re-download for free. Should
Transfer any locally stored videos, including screen recordings, to cloud storage or a computer. Should

Apps and account access

Screenshot or write down your full list of installed apps so you can reinstall them on the new device without hunting through memory. Must
Verify that saved passwords are stored in a password manager or your platform's built-in password sync, not only in a single browser. Must
Identify any apps that store data locally (such as offline games, note apps, or budgeting tools) and use their in-app export or backup feature before switching. Must
Check for app-specific subscriptions that need to be transferred or reactivated under your account on the new device. Should

Two-factor authentication (2FA)

If you use an authenticator app for two-factor authentication, use its built-in account transfer or export feature before you lose access to the old device. Must
Generate and save backup codes for any accounts that offer them, and store those codes somewhere outside your phone. Must
Update your phone number for SMS-based 2FA on critical accounts — banking, email, and social media — before switching SIM cards. Should

Final checks before wiping the old device

On your new phone, open your photos, contacts, emails, and key apps to confirm data transferred correctly before proceeding. Must
Sign out of all accounts on the old phone — Apple ID, Google account, social apps — to deauthorise the device. Must
Remove your SIM card and any microSD card from the old device. Must
Perform a factory reset through the phone's settings menu to erase all personal data before selling, recycling, or storing the old device. Must
If trading in or selling, remove the device from your account's trusted device list via your platform's security settings. Must

Do Not Factory Reset Until Everything Is Verified

A factory reset permanently erases all data on your old phone — there is no undo. Before you wipe the device, open your new phone and manually confirm that your photos, contacts, apps, and authenticator codes are all present and accessible. This verification step takes five minutes and can save you from irreversible loss.

After the Transfer: Securing Your New Device

Once your data is confirmed on your new phone, two tasks remain before you consider the job done. First, revisit your security setup. A new device is a natural moment to strengthen your lock screen, review which apps have access to your location and camera, and make sure automatic updates are enabled. Our mobile security primer for non-technical users covers each of these steps in plain language.

Second, if you plan to sell, trade in, or recycle your old phone, perform a factory reset only after you have verified that every category of data listed in this checklist is safely accessible on your new device. Check your photos, open a few apps, send a test message, and confirm your authenticator app is working. Then — and only then — wipe the old device. For ongoing care of your new phone, the habits described in our phone maintenance guide will help it stay in good shape long-term.

SIM Swaps Can Disrupt SMS Verification

If you transfer your SIM card to a new phone before updating your SMS-based two-factor authentication settings, you may be temporarily unable to receive verification texts on accounts tied to your old number. Update 2FA contact details on your most critical accounts — especially banking and email — before moving your SIM. If you're also changing phone numbers, notify those accounts first.

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Electronics Editorial Team is the collective byline for our editorial team and contributor network. Articles published under this byline or an editorial pen name are researched, written, and reviewed according to our editorial standards for clarity, consistency, and independence before publication.

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