Checking IMEI and warranty duration is always a concern for many phone owners. This Mytour article compiles methods to check for every common mobile device, including the contemporary Samsung Galaxy S23 Ultra 5G 1TB.
1. Samsung

Samsung Service Center in Vietnam
To check the warranty information for your Samsung phone, you can follow these methods:
- Method 1: Compose a message containing the 15-digit IMEI of your device and send it to the toll-free number 6060. You will receive a feedback message about the warranty status of your product.
- Method 2: You can find Samsung Vietnam's service centers here.
2. Apple

Apple
To check the warranty period for Apple products, visit this link, enter your phone's IMEI number, and click continue. Device information and warranty duration will be displayed.
3. Nokia

Samsung's Warranty Centers in Vietnam
Nokia, now Microsoft Devices, has implemented electronic warranty for its products. To check the warranty period, enter the IMEI number at this address. You can also contact the hotline at 1800 1516 for advice on warranty periods or send a message in the format: BH_
4. Sony
For Sony, you can check the warranty period by entering the IMEI (Serial) on Sony's website. Sony's Customer Service Hotline: 1800.588.885. And other Sony service centers. Visit the Sony service center page here.
5. LG
LG currently does not allow checking the warranty period on their website. Therefore, you can call the hotline at 1800 1503, provide the IMEI number, and the customer service representative will assist in checking. Alternatively, you can send a text in the format: LGBH_IMEI to 8069 (where '_' is a space in the message, and the cost is 500VNĐ/message).
6. OPPO
OPPO currently does not provide a website for online warranty information or through text messages. The only way to check warranty information on OPPO phones is to call the hotline at 1800 577 776, provide the IMEI number, and let OPPO staff assist you.
7. Asus

Asus Service Center in Vietnam
Asus currently does not allow users to check IMEI directly. Users are required to call the hotline 1900.555.581 for verification.
8. HTC
HTC Service Center in Vietnam
To check the warranty period for HTC mobile phones, the only method is to directly contact the hotline at 1900 555 567 and provide the IMEI number for the staff to verify the warranty status of the device.