How to Fill in Country/Region and International Dialing Code on OKX for Vietnamese Users?
When registering, select "Vietnam" as the country/region. The international dialing code will either be automatically filled in or you can manually select "+84". Both must match so that your phone number can successfully receive the verification code. Below is a detailed breakdown of this process, including how to operate in the OKX registration interface and the common mistakes to avoid.
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1. How to Select "Country/Region" During Registration
Open the OKX App or web version, go to the registration page, and the first step is to select the country/region.
Specific steps:
App: Tap [Sign Up], find and select "Vietnam" in the "Country/Region" drop-down list.
Web: Also on the registration page, select "Vietnam" as the "Country/Region of Residence".
Completion standard: The drop-down box displays "Vietnam", usually accompanied by the corresponding flag icon.
Note: This country/region selection mainly affects two things: first, the default value of the international dialing code for the phone number; second, the initial determination of your residence for subsequent identity verification (KYC). Selecting a country/region that matches the actual country of your phone number is essential to receiving the verification code.
2. How to Fill in the International Dialing Code "+84"
The international dialing code for Vietnam is +84.
In the OKX registration process, there are usually two ways to enter the phone number area code:
Case A: The system automatically fills in the code based on the country/region
After selecting "Vietnam" as the country/region, the international dialing code in front of the phone number input box will automatically display as "+84". You only need to enter the digits of your phone number in the following input box.
Case B: You need to manually select or enter the code
If the system does not automatically fill it in, click the dialing code selection button in front of the phone number, find and select "Vietnam +84" from the list.
Completion standard: The area code displayed in front of the phone number input box is "+84", matching the Vietnamese local phone number you entered.
3. Notes on the Format of the Vietnamese Phone Number
When dialing domestically in Vietnam, phone numbers usually start with 0 (e.g., 0912345678). This 0 is the domestic long-distance prefix in Vietnam.
However, in international format (including when registering on OKX), you need to remove the leading 0 and only enter the digits after the 0.
Domestic format example: 0912345678
International format example (to enter on OKX): 912345678
If you include the leading 0, the system will recognize it as an invalid number and will not send the verification code.
Prerequisites
Prepare a Vietnamese phone number capable of receiving international SMS.
Ensure the mobile signal is normal and SMS blocking is not enabled.
Check whether OKX services are available in Vietnam — currently OKX is open to Vietnamese users. After registration, identity verification must be completed to normally use the trading functions.
Common Causes of Failure
Country/region does not match the dialing code: You selected "Vietnam" but the area code belongs to another country (e.g., +86), or you selected the +84 area code but chose a different country, the system will refuse to send the verification code.
The phone number includes the leading 0: Some users are accustomed to entering the number in domestic dialing format, adding an extra 0, which leads to an incorrect number format.
The phone number cannot receive international SMS: Some Vietnamese local carriers or plans may have international SMS reception disabled by default. If you cannot receive the verification code after multiple attempts, it is recommended to confirm with your carrier.
Risk Reminders
Restricted region rules: OKX has restrictions or functional differences for users in certain countries/regions. Although Vietnam is not currently on the restricted list, it is recommended to confirm the platform's latest policies before registration.
Identity verification consistency: The selected country/region must be consistent with your actual place of residence and the identity document information subsequently submitted, otherwise it may affect the KYC approval rate.
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FAQ
Q: I selected Vietnam as the country/region, but I will later move to another country. Can I change it? A: The country/region filled in during registration will affect the document selection for identity verification (KYC). If you want to change it, you usually need to submit a change request through human customer service after completing KYC, and the process is relatively complicated. It is recommended to truthfully fill in your current place of residence when registering for the first time.
Q: After entering my phone number, I keep not receiving the verification code. What should I do? A: First check whether the phone number starts with an extra 0 and whether the area code is +84. If the format is correct but you still cannot receive it, try switching between Wi-Fi and mobile data, or wait a few minutes and click "Resend". Some Vietnamese carriers (such as Vietnamobile) may have international SMS delays. You can contact your carrier to confirm whether the international SMS function is enabled.
Final step confirmation:
Open the OKX registration page, select "Vietnam" as the country/region, confirm the area code in front of the phone number is "+84", and then enter your Vietnamese phone number without the leading 0 (e.g., 912345678). Click "Get Verification Code". If you can normally receive a 6-digit verification code and complete the verification, it means both the country/region and dialing code are filled in correctly.
