Changing a smartphone is always an exciting process, especially when it comes to the safety of personal data. The most valuable asset for most users is notebook, which contains the numbers of loved ones, colleagues and important services. Despite the abundance of cloud services, the method of transferring data via Bluetooth remains one of the most popular, since it does not require an Internet connection and registration in third-party systems.
Many device owners are afraid that when switching to a new model, they will lose some of the records or encounter incompatible file formats. In fact, the protocol for exchanging data between devices based on Android is standardized and allows for quick migration. The main thing is to understand the difference between direct file transfer and file export, and also to know where to look for the necessary settings in the modern interface.
In this guide, we will analyze in detail all the nuances of the procedure. You'll learn how to prepare both devices, what file formats are used, and what to do if the transfer freezes midway. We'll also touch on security issues and explain why it's sometimes easier to send one file than hundreds of individual contacts.
Preparing devices for data transfer
Before you begin any active actions, you need to make sure that both smartphones are ready to communicate. Bluetooth adapter must be enabled not only on the sending device, but also on the receiving device. Often, users forget to make their phone visible to other devices, which is why the search does not yield results.
Go to the settings and make sure that in the connections section the adapter status is active. For older versions Android you may need to explicitly enable the “Visibility” option for a certain period of time. On modern shells, such as One UI or MIUI, the device becomes visible automatically when you open the file transfer menu.
⚠️ Attention: Make sure that both phones have enough battery power. The process of scanning and transferring large amounts of data can significantly consume energy, and turning off the screen at a critical moment will interrupt the connection.
It is also recommended to clear the list of previously paired devices, if any, to avoid confusion when choosing the target gadget. This will speed up the process of establishing a handshake between the phones.
Export contacts to a vCard file
The most reliable way to transfer your entire address book is to create a single container file. In the environment Android the de facto standard is the format vCard (extension.vcf). This universal format supports not only names and numbers, but also photos, email addresses, and notes.
Open the Contacts app on your old phone. Depending on the model, you need to press the three dots in the corner of the screen or the menu button. Select Manage Contacts or Import/Export. We are interested in the action Export to file.vcf.
The system will prompt you to select a save location. Usually this is internal memory in a folder Downloads or root directory. Once confirmed, you will receive one file containing all your entries. This is much more convenient than trying to send hundreds of contacts one by one via Bluetooth, as it reduces the risk of connection errors.
If you have several accounts (for example, Google and a SIM card), when exporting, the system will ask where exactly to copy the data from. Select “All contacts” or a specific account to avoid losing entries stored locally.
Some users prefer to export contacts to a memory card SDif one is installed. This allows you to physically transfer the media to a new phone, but in the era of no card slots, this method is losing relevance.
Direct transfer via the “Share” menu
Once the file .vcf is created, the stage of sending it begins. Find the created file through any file manager or directly in the export completion notifications. Click on the file and select the “Share” icon.
In the list of available applications and transfer methods, find the logo Bluetooth. The system will prompt you to select a device from the list of gadgets found nearby. Click on the name of the new phone. The receiving side will ask you to confirm receipt of the file - you must accept it.
⚠️ Attention: The transmission speed via Bluetooth is relatively low. If your address book contains several thousand contacts with photos, the process may take from 5 to 15 minutes. Stay close to your devices or block the screen during the transfer.
An alternative method is to select contacts directly in the Contacts application. You can select all entries (usually by long pressing on one of them), click the "Share" button and select Bluetooth. In this case, the phone itself will generate a temporary vCard file and send it.
However, when trying to send more than 500-1000 contacts directly through the contacts menu, some shells Android may throw an error or freeze. Using a pre-created file through a file manager is a more stable solution for large archives.
☑️ Check before sending
Importing received data on the new device
When the file is successfully transferred, it is usually saved in a folder Bluetooth or Downloads on the new smartphone. Simply clicking on it is not enough - you need to initiate the import process into the system notebook.
Open the file through the file manager. The system will automatically recognize the format vCard and offer to open it through the Contacts application. After clicking, the data reading process will begin. You will be asked to choose where to save your contacts: to your Google Account, to your phone, or to your SIM card.
We strongly recommend saving data to your account Google. This will ensure automatic synchronization and protection against future loss. If you choose to save to a device, the data will be linked only to this specific device.
| Option | Save to Google | Save to device | Save to SIM |
|---|---|---|---|
| Security | High (cloud) | Low (will be lost when reset) | Medium (risk of card damage) |
| Data volume | Unlimited | Limited by phone memory | Very small (only name and number) |
| Add. fields | Photo, email, address | Photo, email, address | Name and number only |
| Accessibility | From any device | Only from this phone | After rearranging the card |
Once the import is complete, be sure to go to the Contacts app and check for records. Sometimes the process may complete with a success message, but due to duplicates the list may not look correct.
Solving common problems and errors
Despite the simplicity of the method, users often encounter technical glitches. One of the common problems is the “Failed to send file” error or the endless “Waiting” status. This is often due to the fact that the receiving device did not confirm the pairing in time.
Try turning it off and on again Bluetooth on both phones. It's also worth checking to see if your new phone has Do Not Disturb or Flight mode enabled, which may block incoming file transfer requests.
What to do if the file is damaged?
If after importing contacts are displayed incorrectly (crazy letters instead of letters), the problem is in the file encoding. Try opening the file on your computer using Notepad and saving it in UTF-8 encoding, then repeat the import.
Another difficulty arises when transferring contacts with Cyrillic names to very old phone models or devices from other manufacturers. In rare cases, characters may be replaced with question marks. In such a situation, repeated export with the choice of a different encoding helps, if such an option is available in the contact manager.
⚠️ Attention: The interfaces of the “Contacts” menu may differ depending on the version of Android and the manufacturer’s shell (Samsung, Xiaomi, Huawei). If you do not find the “Export” item, use the search in settings or install a third-party application for managing contacts from the Play Market.
If the transfer is constantly interrupted by 50-60%, try clearing the cache of the “Bluetooth” application in the system settings. Go to Settings → Applications → Show system processes → Bluetooth → Memory → Clear cache.
Alternative methods and data security
Although Bluetooth is a reliable method, it is not the only possible one. For those who are concerned about the security of data during direct transmission over the air, there are more modern protocols, such as Wi-Fi Direct or proprietary utilities like Smart Switch and Mi Mover.
However, the advantage of Bluetooth is its isolation. The data does not pass through third-party servers and does not require Internet access, which minimizes the risk of information interception by third parties on public networks.
However, before selling or disposing of the old phone from which you transferred the data, do not forget to perform a full reset. Deleting files manually does not guarantee that they cannot be recovered using special utilities.
Using a vCard file via Bluetooth is a balance between speed, security and versatility, suitable for any pair of Android devices.
Remember that regular backup is more important than the transfer method. Set up automatic synchronization with the cloud so that in the future the procedure for changing a phone takes only a few minutes after entering your login and password.
Frequently asked questions (FAQ)
Is it possible to transfer contacts via Bluetooth if the phones have different versions of Android?
Yes, file format vCard is a universal standard. You can easily transfer contacts from Android 14 to Android 8 or even older versions, as well as to devices with other operating systems that support this format.
What to do if contacts are duplicated during import?
This is a common situation. After importing, go to the Contacts application, open the menu and select Manage Contacts → Merge Duplicates. The system will automatically find duplicate entries and offer to merge them into one.
Will photos of contacts be transferred via Bluetooth?
Yes, if you export contacts in the format .vcf. In this file, photographs are encoded into text form and transmitted along with the name and number. When imported, they will automatically appear in the address book of the new phone.
How long does it take to transfer 1000 contacts?
The time depends on the size of the photo files. If your contacts contain only text, the transfer will take a few seconds. If each contact has a high-resolution photo, the process may take 2 to 5 minutes due to limited bandwidth. Bluetooth.
Will the contacts disappear from the old phone after the transfer?
No, the Bluetooth transfer process is a copy, not a move. All data will remain unchanged on the old device until you delete it yourself or reset the settings.