Moving to a new smartphone or replacing a damaged SIM card often requires saving important information, and contacts are its foundation. Device owners Samsung Galaxy are faced with the need to move recordings from internal memory or cloud storage to physical media to ensure maximum compatibility. Despite the development of cloud technologies, SIM card remains a universal standard that allows you to quickly restore the phone book when changing an operator or device without access to the Internet.
The procedure for copying numbers in the ecosystem Android on devices of the Korean brand has its own nuances associated with the shell interface One UI. Users need to understand the difference between data storage formats, since the internal memory of the smartphone supports extended fields that the physical card chip does not accommodate. Before starting a mass transfer, it is critical to make a backup copy of your current contacts to your Google account to avoid irretrievable data loss in the event of a failure recordings. In this material we will analyze in detail the algorithms of actions, hardware limitations and ways to solve typical problems.
Preparing the device and checking format compatibility
Before taking active steps in the menu, make sure that the SIM card is correctly detected by the system and has sufficient free memory. Older format cards may have a limit of only 250 entries, while modern ones usually support up to 500 contacts, but this value varies by carrier. Go to your phone's settings to make sure the card is active and not locked with a PIN code, which may prevent new data from being written. Mini-SIM or early Micro-SIM may have a limit of only 250 records, whereas modern Nano-SIM Typically support up to 500 contacts, but this varies by carrier. Go to your phone's settings to make sure the card is active and not locked with a PIN, which could prevent you from writing new data.
You should also take into account that the storage format on the SIM card is extremely primitive compared to the digital database of a smartphone. Only the name (often with a character limit, usually up to 14-16 characters) and one primary phone number are stored on the chip. Fields such as email address, position, photograph, residential address or second extension number will be irretrievably lost during export. Contactcontaining multiple numbers will be split into separate records or only the first one will be saved.
⚠️ Attention: If your SIM card was released more than 10 years ago, it may not support the encoding UTF-8. This will cause contact names written in Cyrillic to appear on another phone as unreadable characters or hieroglyphs. In this case, it is recommended to replace the card with a modern one from the operator.
For a successful operation, free up space in the phone book by deleting duplicates or outdated entries that you do not plan to transfer. This will simplify navigation and speed up the process of selecting the right subscribers. Also check the device's battery charge - it should be at least 30-40% so that the phone does not turn off at the most crucial moment of writing data to the chip.
Before transferring, open the list of contacts and quickly scroll through it to visually assess the amount of data that needs to be processed. This will help you understand how long the procedure will take.
Step-by-step guide for exporting through the standard Contacts application
The main and most reliable method of moving data is implemented through the standard application Contact, preinstalled on all smartphones Samsung. The interface may differ slightly depending on the version Android and shell One UI, but the logic of action remains the same for the entire Galaxy line. Open the application, which usually has an orange icon with a silhouette of a person, and make sure that you are in the tab with a list of all subscribers.
Next you need to call up the control menu. In modern versions of the interface, this is done by clicking on the three horizontal bars or three dots located on the right side of the screen (usually to the right of the search bar or in the bottom corner). In the list that opens, select Manage contacts. This section contains all the tools for importing, exporting and merging duplicates.
☑️ Number portability algorithm
In the control menu, find and tap on the option Copy contacts. The system will prompt you to select a data source. If your numbers are saved in the phone memory or synchronized with your account Google, select the appropriate item. If they are recorded directly on the device without being linked to the cloud, select Phone. After selecting the source, the system will ask for the destination - here you need to specify your SIM card (it can be displayed as SIM 1 or SIM 2 in dual-SIM models).
After selecting the recipient, a list of all records available for transfer with checkboxes for selection will appear on the screen. You can mark specific numbers manually or use the function All in the upper corner for mass selection. When the selection is complete, press the Done or Copy. The recording process can take from a few seconds to a couple of minutes depending on the number of subscribers.
Why are some contacts not copied?
If you selected all contacts, but to the SIM card Fewer numbers have been recorded than were on the list, check the length of the names. Contacts with names longer than 14-16 characters or containing special characters not supported by the GSM standard may be automatically skipped by the system during export.
Working with groups and selective data transfer
Often users need to transfer not the entire phone book, but only a certain category of subscribers, for example, colleagues or relatives. The interface Samsung provides a convenient grouping system that greatly facilitates this task. Before starting the export, go to the Groups section inside the contacts application and make sure that the necessary subscribers are distributed into the appropriate categories.
When performing the copying procedure described in the previous section, at the stage of selecting contacts, you can not press the “All” button, but use the filter. Click on the filter icon (often looks like a funnel or sliders) and select the group you want. This will cut off unnecessary entries and allow only the target segment of the phone book to be copied to the SIM card. This approach saves precious space on the chip, which is often limited.
- 📂 Groups allow you to quickly sort contacts by type: “Family”, “Work”, “Friends”.
- ✂️ Selective transfer helps avoid filling up the SIM card memory with unnecessary entries.
- 🔄 Grouping is possible edit even after the transfer, adding or removing people from the lists.
Therefore, for critical contacts such as emergency services or close relatives, it is recommended to check the result immediately after recording. If the name has been cut off, you can edit it directly on the SIM card through the same contact management menu by selecting Edit.
⚠️ Attention: When making selective copies, carefully monitor which checkboxes are active. Accidentally deselecting an important contact will result in it remaining only in the phone memory and will not be available when you insert the card into another device.
Technical limitations and storage features on SIM
Users often wonder why profile photos or second numbers disappeared after the transfer. The answer lies in the SIM storage architecture, which was designed decades ago for voice communications, not multimedia directories. The technical standard GSM strictly regulates the amount of information that can be recorded on the chip, and it is not comparable with the capabilities of the internal flash memory of a smartphone.
The table below shows a comparison of data storage capabilities in different environments so that you can clearly see the losses during transfer:
| Parameter | Phone memory / Google | SIM card |
|---|---|---|
| Max. number of contacts | Unlimited (depending on location) | Usually 250-500 records |
| Name length | Up to 100+ characters | Strictly up to 14-16 characters |
| Number of numbers | Unlimited | Only 1 number per contact |
| Photo and media | Supported | Not supported |
| Additional. fields (email, address) | Supported | Not supported |
Another feature is that when transferring a contact with two numbers (for example, mobile and work) to the SIM card, only the first number specified in the card will be saved. The remaining data will be discarded and cannot be recovered from this source. Therefore, before exporting complex cards, it is recommended to manually create separate records for each important number if you plan to store them on a physical medium.
A SIM card is only suitable for basic storage of a name and one number. To save the complete history of communication, photos and notes, use synchronization with the cloud or export to a .vcf file.
Alternative methods and import via vCard file
If the standard copying method for some reason does not work or you need to transfer contacts between different types of devices (for example, from iPhone to Samsung), the most universal solution is to use a file format vCard (.vcf). This format is the industry standard for exchanging contact information and supports saving all fields, including photos and addresses, in one file.
To create such a file, go to the menu Manage contacts and select Move or save contacts, and then Save contacts. The system will prompt you to select a file format - make sure .vcfis selected. The file will be saved in the internal memory of the device, usually in the folder Downloads or Contacts. This file can be transferred to any other device via Bluetooth, instant messenger or email.
However, it is worth noting an important nuance: you cannot directly write the .vcf file to the SIM card. The SIM card does not have a file system to store such objects. The vCard file is used to transfer data to the memory of another phone or to the cloud, from where it can be copied to the SIM using the standard method. This is a two-step process that ensures that all data is safe in the interim.
Export file path:
Internal memory → Download → contacts.vcf
Using a backup file also allows you to bypass the limit on the number of characters in the name during intermediate storage. You can store the full version of your contacts in a file on your computer or in the cloud, and only store shortened versions on your SIM card for emergencies. This creates a reliable two-level protection system for your phone book.
⚠️ Attention: The menu interface and item names may vary slightly depending on the One UI firmware version. If you do not find the specified item, use the settings search or check the official manual for your specific Samsung model.
Is it possible to merge duplicates before exporting?
Yes, there is a Merge Contacts option in the Manage Contacts menu. The system will automatically find records with the same names or numbers and offer to merge them into one card, which will clear the list before transferring to SIM.
Troubleshooting and common errors during transfer
During operation, users may encounter a situation where the copy button is inactive or the process ends with an error. Most often this is due to the fact that the SIM card is completely full. Unlike phone memory, here you cannot simply “delete unnecessary” by the system - you need to manually go into contacts, filter them by displaying only from the SIM card and delete unnecessary entries, freeing up space.
Another common problem is the absence of a SIM card selection item in the destination menu. This can happen if the card is not recognized by the phone, the contact pad is damaged, or the card is blocked. Try removing the tray, wipe the chip with a soft cloth and insert it back until it clicks. Also check in the network settings whether the card is visible to the operator.
- 🔒 Make sure that the PIN code request does not block data recording in the background.
- 💾 Check whether write protection is installed on the card itself (rare, but happens on corporate SIMs).
- 📵 Reboot device if the contacts menu freezes or does not respond to touches.
If contact names appear as question marks or hieroglyphs during transfer, the problem is with the encoding. Old SIM cards use encoding GSM 7-bit default alphabetthat does not support Cyrillic or specific characters. The only solution in this case is to replace the SIM card from the telecom operator with a new one that supports encoding UTF-8 or an extended character set.
If the phone does not see the SIM card after transferring the contacts, try turning off the device, removing the card, carefully wiping the gold contacts with an eraser and inserting it back. Oxidation often interferes with correct recording.
Frequently asked questions (FAQ)
How many contacts can a Samsung SIM card hold maximum?
Capacity depends on the operator and year of issue of the card. The standard range is from 250 to 500 records. The exact number of free spaces can be seen in the contact management menu when you try to copy - the system will show the status of the SIM memory.
Is it possible to transfer contacts from a SIM card back to the phone?
Yes, this is possible. In the same menu Manage contacts select item Import contacts, specify the SIM card as the source, and the phone memory or Google account as the destination. It is recommended to do this immediately after purchasing a new phone.
Why is the contact name cut off when copying?
This is a technical limitation of the SIM card standard, which allows you to store no more than 14-16 characters in the name field. All characters above this limit are automatically deleted when written to the chip. It is recommended to use short names for contacts stored on SIM.
Will contacts disappear from the phone after transferring to the SIM card?
No, when using the function Copy the originals remain in the phone's memory. Contacts are deleted only if you use the Move function (if it is available in your software version) or manually delete them after checking the entry on the SIM.
How to transfer contacts if the phone screen is broken?
If the sensor does not work, but there is an image, you can connect a USB mouse via an OTG adapter and control the menu with the cursor. If the screen is completely black, transfer is possible only through a Google cloud account from a computer or using PC apps such as Samsung Smart Switch, provided that USB debugging is enabled.