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Continue ShoppingA lot of global players jumped into the Taiwan version of Aion 2 expecting a smooth login, especially because early pre-registration periods allowed many overseas accounts to get in without extra checks. But once the servers officially launched, NCSoft added mandatory phone and device verification for almost everyone.
Now many players outside Taiwan are getting stuck at the phone number screen, or seeing errors like 40309:500 when trying to verify their account. The good news is that this usually is not a permanent block. In most cases, it is either a formatting issue, overloaded authentication servers, or a regional SMS delivery problem.

Here are the methods that players are currently using to solve the issue.
NCSoft added this verification system mainly to reduce:
The Taiwan server now treats phone verification as part of its security system. Even players who already created an NCSoft Purple account may still get asked to verify again when launching Aion 2 for the first time.
For overseas users, the biggest problem is that the verification page is extremely picky about number formatting and region support.
For many players, the easiest fix is simply entering the number correctly. The system does support international numbers, but the interface is buggy and inconsistent.
Before typing your number, open the dropdown menu and choose your country.
Examples:
Do not manually type the country code yourself if the menu already added it.
This is the mistake most players make.
If your local number starts with a leading zero, remove it after selecting the country code.
Example:
| Wrong Format | Correct Format |
|---|---|
| +44 07123 456789 | +44 7123 456789 |
| +61 0412 345 678 | +61 412 345 678 |
The NCSoft system often rejects numbers when the local leading zero is included.
If verification fails the first time:
A surprising number of players report that the second clean attempt works immediately.
If your carrier never receives the SMS code, or the game says your region is unsupported, the community workaround is using a temporary virtual number.
This method works for many players because some regions are filtered by NCSoft's verification provider.
Players commonly use temporary SMS receiver services or apps.
Typical choices include:
Inside the service:
Most players report good results with:
| Region | Country Code |
|---|---|
| Hong Kong | +852 |
| Netherlands | +31 |
These usually cost very little.
Keep the virtual SMS page open while logging in.
Then:
Once accepted, your device becomes authorized.
After successfully logging in:
Many players do this immediately so they do not lose account access later.
This error is one of the most common login problems right now.
Usually it means:
Here are the fastest fixes.
During peak hours, NCSoft's authentication servers get overloaded.
If the SMS does not arrive:
A lot of players eventually receive the code after multiple attempts.
Some players cannot even open the blue verification window.
If the popup freezes:
This fixes permission-related loading problems for many users.
Ironically, some VPN regions trigger extra security checks.
If verification keeps failing:
Some players report that rotating VPN regions also helps.
Corrupted launcher cache can also break verification.
Try this:
This often fixes endless loading circles or frozen security prompts.
Generally, yes — but there are risks.
Temporary numbers can expire quickly. If you lose access and the number gets recycled, recovering your account later becomes difficult.
That is why many experienced players immediately replace the temporary number with:
That way, future security checks become much easier.
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