Synchronizing two Android devices: a complete guide with proven methods

Synchronizing two Androiddevices is a task that every user faces when purchasing a new smartphone, tablet, or when it is necessary to exchange data between gadgets. From transferring contacts and photos to syncing notes and call history, there are plenty of options, but not all of them are equally effective. The main problem: most users are limited to standard cloud services, unaware of faster and safer alternatives.

In this article we will look at 5 proven methods of synchronizationincluding little-known features Android 12+that speed up the process by 2-3 times. You'll learn how to transfer your data without loss, which apps to avoid (and why), and how to automate synchronization so you don't have to do it manually every time. We will pay special attention hidden Google Account settings that allow you to synchronize even SMS history and application data without root access.

1. Synchronization via Google Account: basic method with pitfalls

The most obvious way is to use built-in synchronization via Google Account. It works out of the box on all devices with Android 5.0+, but has limitations that are rarely warned about. For example, Google Photos compresses images when loading in "High Quality", and Google Contacts does not always process duplicates correctly.

To enable synchronization:

• 📱 Open Settings → Accounts and archiving → Google on both devices.
• 🔄 Select an account and activate the switches for the ones you need data: Contact, Calendar, Notes (if you use Google Keep).
• ☁️ For photos, go to Google Photos → Settings → Backup and synchronization.
• ⚡ Click Synchronize now (in some firmware the option is hidden in the account menu).

Important: Google Drive does not synchronize files automatically - for this you need to manually upload them to the "My Drive" folder. Also note that history calls and SMS are synchronized only on devices with Android 8.0+ and with the option enabled in Google Settings → Google Services → Backup.

⚠️ Attention: If another Google account was previously used on one of the devices, the data may be duplicated or conflict. Before synchronization, it is recommended to clear the application cache Contact and Google Play Services via Settings → Applications.

2. Local synchronization over Wi-Fi: without clouds and restrictions

If you need to transfer large files (videos, application backups) or you do not trust cloud services, local Wi-Fi network is an ideal option. The method works without the Internet and is 10 times faster than Bluetooth. The main condition: both devices must be connected to the same network.

The most reliable applications for this:

• 📲 LocalSend (open source, without unnecessary water) - supports folder transfer and preserves the file structure.
• 🔗 Send Anywhere - generates a 6-digit connection code, works even between Android and iOS.
• 📎 Feem - creates a local network even without a router (via Wi-Fi Direct).

Instructions for LocalSend:

1. Install the application on both devices from Google Play or official site.
2. On the first device, select files and click Send → Select device.
3. On the second device, confirm receipt in the notification.
4. Done! The files will be saved to the folder Downloads/LocalSend.

Application	Max. speed	File limit	Add. functions
LocalSend	up to 50 MB/s	no	Encryption, transfer history
Send Anywhere	up to 30 MB/s	10 GB	Cross-platform, links
Feem	up to 20 MB/s	no	Wi-Fi Direct, chat
Xender	up to 40 MB/s	no	Transferring applications (APK)

⚠️ Attention: When using public Wi-Fi networks (cafes, airports), enable encryption in the application settings. B LocalSend this is an option Enable encryption in the settings menu.

3. Bluetooth: when it's justified (and when it's not)

Bluetooth is often criticized for its low speed, but it is indispensable in two cases: when there is no Wi-Fi or you need to transfer small files (contacts, notes) with minimal battery consumption. Modern versions Bluetooth 5.0+ (starting from Android 8.1) support speeds of up to 2 MB/s - this is enough to transfer 100 contacts in 5 seconds.

How to synchronize contacts via Bluetooth:

1. On the first device, open Contact, select the ones you need and click Share → Bluetooth.
2. On the second device, confirm reception in the notification.
3. The file with contacts (.vcf) will be saved in the folder Bluetooth - open it to import.

To transfer files:

• 📎 In File manager select files → Send → Bluetooth.
• 🔍 If the device is not visible, check the visibility in Settings → Connected devices → Bluetooth.

Why is Bluetooth slower than Wi-Fi?

Bluetooth uses a 2.4 GHz radio channel with limited bandwidth (max. 3 Mbit/s in version 4.2 vs 54 Mbit/s for Wi-Fi 4). In addition, the Bluetooth protocol adds service data, which reduces the useful speed by 20–30%.

The main disadvantage of the method is file size limit (usually up to 100 MB). For video or backups, it is better to use Wi-Fi Direct.

4. Synchronization via OTG cable: for large amounts of data

If you need to transfer tens of gigabytes of data (for example, a backup Titanium Backup or a collection of movies), direct connection via cable is the most reliable way. To do this you will need:

• 🔌 OTG cable (USB-C → USB-C or microUSB → USB-C depending on the ports).
• 📱 One of the devices must support USB Host Mode (most smartphones on Android 6.0+).

Step-by-step guide:

1. Connect the devices with a cable. A notification will appear on the screen USB connection.
2. On the device that will be the “host” (usually new), select File transfer (MTP).
3. On the second device, open File manager —it will appear as an external drive.
4. Copy files manually or use Total Commander for packet transfer.

Advantages of the method:

• ⚡ Speed up to 480 Mbit/s (USB 2.0) or 5 Gbit/s (USB 3.1).
• 🔒 No risk of data interception (unlike Wi-Fi).
• 📱 Works even on devices without root and with a broken screen.

⚠️ Attention: On some devices Samsung and Xiaomi when connecting via OTG, you may need to enable USB debugging v Settings → For developers. If the option is missing, click on Build number v Settings → About phone.

5. Third-party applications for automatic synchronization

If you need Continuous synchronization (for example, to backup photos or work documents), standard tools Android are not enough. Specialized applications will help with this:

Application	Synchronization type	Features
Sync.com	Cloud	Encryption "zero knowledge", 5 GB free
Resilio Sync	P2P (without cloud)	Synchronization between devices directly
Dropsync	Cloud + local network	Automatic upload to Google Drive, Box, OneDrive
FolderSync	Two-way	Support for WebDAV, FTP, SFTP

For example, Resilio Sync allows you to create distributed network between devices without a central server. Enough:

1. Install the application on both devices.
2. Create a folder for synchronization on the first device.
3. Generate access key and enter it on the second device.
4. All changes will be automatically synchronized via Wi-Fi or mobile network.

Suitable for automatically uploading photos to the cloud Dropsync:

• 📸 Select a folder with photos (for example, DCIM/Camera).
• ☁️ Specify the target cloud (Google Drive, Dropbox).
• ⏱ Set up a schedule (for example, synchronization every hour).

6. Synchronization of application data: contacts, SMS, notes

Standard synchronization via Google does not cover SMS, call log data of some applications (for example, WhatsApp or Telegram). To do this, you will need specialized tools:

For SMS and calls:

• 📞 SMS Backup & Restore - exports messages to XML and uploads them to Google Drive.
• ☎ Super Backup - saves the call log in format.vcf.

For WhatsApp:

• 💬 Built-in backup in Settings → Chat → Backup (saves in Google Drive).
• 🔄 To transfer between devices, use WhatsApp Transfer (requires root on the old device).

For notes and tasks:

• 📝 Google Keep — synchronized automatically via Google Account.
• 📌 Microsoft To-Do —an alternative with integration into Outlook.

Important: When transferring WhatsApp to a new device do not install the application in advance. First, copy the backup copy to the folder /sdcard/WhatsApp/Databasesthen install WhatsApp and restore the data the first time you start it.

7. Synchronization problems and their solutions

Even with the correct settings, synchronization may fail. Here are the most common problems and ways to fix them:

Problem	Cause	Solution
Contacts are not synchronized	Account conflict	Delete duplicate accounts in Settings → Accounts
Photos are not uploaded to Google Photos	Traffic limiting	Disable Saving traffic in Google Photos settings
Bluetooth does not find the device	Outdated version of the protocol	Update the firmware or use Wi-Fi Direct
LocalSend does not connect	Firewall blocking	Allow the application to access the network in Settings → Applications

If synchronization via Google is stuck:

1. Check if it is enabled option Auto-sync in Settings → Accounts → Google.
2. Clear cache Google Play Services (Settings → Applications → Google Play Services → Memory → Clear cache).
3. Reboot the device - this resets background synchronization processes.

To diagnose problems with Wi-Fi transmission:

• 📶 Check that both devices are connected to the same network (not the guest network!).
• 🔧 Disable the VPN - it can block local traffic.
• 📡 If the speed is low, try switching to the 5 GHz channel in the router settings.

⚠️ Attention: On On devices Huawei and Honor without Google services (for example, Huawei P40 Pro), standard synchronization via Google Account is impossible. Use Huawei Mobile Cloud or third-party applications like Resilio Sync.

FAQ: Frequently asked questions about synchronizing Android devices

Is it possible to synchronize two Android devices without the Internet?

Yes, these are suitable for this:

• 🔄 Local Wi-Fi network (applications LocalSend, Send Anywhere).
• 📎 Bluetooth —for small files.
• 🔌 OTG cable —for large amounts of data.

All these methods work without access to the Internet.

How to transfer applications from one Android to another?

Ways to transfer applications:

• 📲 Via Google Play: on the new device, log in to the same account and install applications from the section Library.
• 📦 Via a backup: use Titanium Backup (requires root) or Swift Backup.
• 🔗 Via APK: copy the .apk files from the folder /data/app (requires root) or use APK Extractor.

Attention: Transferring APK does not save application data (for example, progress in games). This requires a full backup.

Why does synchronization via Google Drive take so long?

Reasons for slow synchronization:

• 📶 Low Internet speed or traffic limitation.
• ☁️ Large amount of data (for example, thousands of photos).
• 🔋 Battery optimization, blocking background activity Google Play Services.

Solutions:

• Connect to 5 GHz Wi-Fi.
• In Settings → Accounts → Google click Sync now.
• Disable battery optimization for Google Play Services.

Is it possible to synchronize call history between Android devices?

Yes, but with reservations:

• ☎ On devices with Android 8.0+ call history is synchronized via Google Account if backup to Google Settings → Google Services → Backup.
• 📱 On older versions, use applications like Call Logs Backup & Restore.

Limitation: only data from the last backup is synchronized.

How to sync browser bookmarks between two Android devices?

Methods depending on the browser:

• 🌐 Google Chrome: automatically synchronized via Google Account (check in Settings → Synchronization).
• 🦊 Mozilla Firefox: use Firefox Account to synchronize bookmarks, history and passwords.
• 🔍 Samsung Internet: synchronize via Samsung Account (only on Samsung devices).