There are 6 main categories of common reasons why an iPhone might not receive an Apple ID verification code: carrier SMS delay, mobile manager blocking, insufficient account balance, risk control restrictions, international SMS not enabled, or abnormal DNS resolution. If you are preparing to log in to the Binance Official Website or install the application via the Binance Official APP download entry and are stuck at the verification code stage, you can first locate the problem following the process below, and then refer to the iOS Installation Tutorial to complete the subsequent steps. Verification codes normally arrive within 1-3 minutes; if they haven't arrived after 10 minutes, it's considered an abnormality.
I. Verification Code Delivery Mechanism
Apple ID verification codes fall into three categories: SMS codes, voice calls, and trusted device pop-ups. SMS codes go through international SMS gateways partnered with Apple, sent from data centers in the US or Ireland, passing through international SMS access points in your region before being delivered to your phone. The longer the chain, the higher the delay.
Step 1: Confirm the Delivery Channel
When triggering a recovery at iforgot.apple.com, the page will let you choose "SMS" or "Phone." The default is SMS. If you don't receive it the first time, you can switch to Phone after 10 minutes; the success rate of voice calls is significantly higher than that of SMS.
Step 2: Check Signal Strength
When the signal bars are below 2, international SMS messages are easily lost. Toggle Airplane Mode on and then off to force the phone to re-register with the base station. This step can solve about 30% of non-receipt issues.
Step 3: Check Blocking Records
iPhone has built-in filtering: Messages → Unknown & Junk. Third-party mobile managers (such as 360 or Tencent) will categorize SMS messages starting with international numbers (+1) into the block box. Verification code numbers are usually +1 888, +1 877, or four-digit short codes.
II. Restrictions at the Carrier Level
Different carriers handle international SMS differently, leading to significant variations in arrival rates.
| Carrier | Default International SMS Status | First Application Duration | Typical Code Delay |
|---|---|---|---|
| China Mobile | Manual activation required | Effective same day | 1-2 minutes |
| China Unicom | Enabled by default | No application needed | 30 seconds - 1 minute |
| China Telecom | Activation required for some plans | 1-24 hours | 1-3 minutes |
If you are using a campus card, IoT card, or virtual carrier card, it's very likely it doesn't support receiving international SMS at all. The solution is to switch to a phone number from a mainstream carrier.
Automatic Blocking Due to Arrears
When the account balance is below 5 units of currency, some carriers will stop international SMS reception, even if domestic SMS can still be received. Top up to above 10 units and try again.
III. Identifying Risk Control Reasons
Apple's risk control system will suspend sending verification codes under the following 3 circumstances:
- More than 5 requests from the same number within 24 hours.
- Account recently logged in from IPs in multiple countries.
- Abnormal login detection was triggered.
When risk control occurs, the page will display "Too many verification codes sent" or "Please try again later." In this case, wait 8 hours before trying again; do not repeatedly click send during this period.
IV. Resend and Alternative Solutions
Option 1: Trusted Device Pop-up
If another iPhone, iPad, or Mac is logged into the same Apple ID, the verification code will appear as a pop-up and does not rely on SMS. This is the most stable way.
Option 2: Switch to Phone Call
On the verification page, click "Didn't receive code" → select "Call me." Apple will read out a 6-digit number in English within 30 seconds, twice. Voice calls use PSTN links and do not rely on international SMS gateways.
Option 3: Generate a Recovery Key
If a 28-digit recovery key was set up in advance, you can skip the SMS and log in directly using the key. This is Apple's recommended long-term backup.
Option 4: Change Linked Number
If you can log into the account: Settings → Apple ID → Login & Security → Trusted Phone Numbers → Add a new number and delete the old one. Keep at least one usable number, otherwise you won't be able to recover it later.
V. FAQ
Q: What if I haven't received the SMS after waiting all day? A: First, call your carrier to confirm if international SMS is enabled, then go to iforgot.apple.com, select "Didn't receive verification code" to enter the alternative process, and reset via email questions or security questions.
Q: Changed numbers without updating Apple ID and now can't log in? A: Visit iforgot.apple.com, click "No access," and follow the prompts for account recovery. The entire process takes 3-14 days of manual review, during which the account remains locked.
Q: Is a verification code still needed after turning off two-factor? A: Two-factor authentication cannot be completely turned off; it can only be downgraded from two-step verification to basic login. A verification will still be required for the first login on a new device, but it will be replaced by security questions instead of a 6-digit code.
Q: Can I receive an Apple ID verification code while roaming abroad? A: Yes, but you need to have international roaming services enabled by your carrier. Some carriers require manual application, while others enable it by default for certain plans. Receiving international SMS while roaming is usually free.
Q: Received the code but it says expired? A: Apple ID verification codes are valid for 10 minutes. If you enter it more than 10 minutes after receiving it, you need to apply again. Do not repeatedly click "Resend," as this will trigger risk control. Enter it immediately after receiving it, and you can then smoothly proceed with the Binance APP download process.