A verification code that never shows up can block a sign-in even when the password is right. Start with the code request itself, then check the delivery path, the message filters, and the backup methods already attached to the account. The fixes below stay inside current Google, Apple, Microsoft, Instagram, Android, and Samsung support guidance from July 2026.
1. Request a fresh code and enter only the newest one
- 1.Stay on the service's Sign in or Verification screen.
- 2.Select the Resend option shown by that service.
- 3.Wait for the newest message before entering a code.
- 4.Type only the most recently sent code in the Verification code field.
2. Switch to another approved sign-in method
This fixes sign-ins where one code route is delayed but another second step is already available.
Enter your Username and Password again.
On Google, select Try another way to sign in or More options.
Then choose a listed method such as Google prompt, Backup phone, Backup code, Passkey, Security key, or a trusted device.
Complete the prompt, code, passkey, or key challenge shown on the screen.
3. Check phone signal and SMS delivery
Confirm the phone has active Cellular Service.
Send or receive a normal text in Messages on the same number.
After that, move to stronger signal before using Resend again.
On iPhone X or later, swipe down from the top-right corner to open Control Center, then turn off Airplane Mode if it is on.
On iPhone SE or iPhone 8 and earlier, swipe up from the bottom edge to open Control Center, then turn off Airplane Mode if it is on.
Contact your carrier when normal texts work but short-code or verification texts do not.
If you request more than one code, stop and use the newest code only.
4. Open filtered and blocked message folders
This fixes codes that arrived but were hidden by sender screening, spam filtering, or a blocked contact.
On iPhone, open Messages, tap Filters, then tap Unknown Senders.
To return a sender to the main list, open the conversation and tap Mark as Known.
To unblock a sender on iPhone, go to Settings > Privacy & Security > Blocked Contacts > Edit, tap the delete button next to the sender, then tap Unblock.
On Android with Google Messages, open Google Messages, tap your Profile photo or icon, tap More options, open Spam & blocked, select the sender, then tap Unblock. Google notes the menu can look slightly different by app version.
To test Google Messages filtering, open Messages settings > Spam protection, turn Enable spam protection off briefly, then turn it back on after testing.
5. Search email spam and blocked sender rules
For email codes, check the mailbox attached to the account, including the primary alias or alternate address used for sign-in verification.
In Gmail on desktop, open Settings > See all settings > Filters and Blocked Addresses to review blocked senders and filters, then remove anything that captures the verification sender.
You can also create a Gmail filter for that sender or domain and choose Never send it to Spam.
For Microsoft account codes, check Junk Email for mail from an @accountprotection.microsoft.com address.
6. Correct authenticator codes and push alerts
This fixes authenticator codes that are rejected and approval prompts that never appear.
In Google Authenticator, enter the code before it expires.
On Android, open Clock > More > Settings > Change date and time, then turn on Automatic date and time.
Under Android Time zone, turn on Automatic time zone.
On iPhone, open Settings > General > Date & Time, then turn on Set Automatically. If the time is wrong, turn it off and back on.
In Microsoft Authenticator, tap Settings > Notification Settings, then turn on Show notifications.
In your phone's system settings, allow notifications for Microsoft Authenticator.
In Microsoft Authenticator, open Settings and turn on App updates.
7. Update recovery details after you get back in
Once the account opens, fix the weak recovery path before the next lockout.
For Google, open Google Account > Security & sign-in > How you sign in to Google > 2-Step Verification, then under Backup codes choose Continue and select Refresh to create a fresh set, which deactivates the old one.
If your 2-Step Verification section shows Show codes instead, select that, then select Get new codes.
For Instagram, open Profile picture > Menu > Accounts Center > Password and security > Two-factor authentication to update the text-message phone number or set up Authentication app.
Do not use Google Voice as the only Google verification destination, and replace VoIP numbers for Microsoft account verification with a mobile phone number.
8. Start account recovery when every method fails
This fixes lockouts where no saved second step, trusted device, backup phone, backup code, passkey, or security key is available.
For Google, open Google account recovery and follow the prompts.
Answer the Ownership questions shown during recovery.
Next, provide a reachable Email address or Phone number when asked.
Enter any code sent to that contact method in the Verification code field.
Plan for Google 2-Step Verification recovery to take 3 to 5 business days.
For Microsoft, begin sign-in, then at Verify your identity, select I don't have any of these and follow the replacement or recovery prompts.
9. Handle Apple, Android switching, and work accounts
For an Apple Account, select Didn’t Get a Code? or Can’t get to your devices?, then send the code to your trusted phone number by text message or phone call.
When a trusted Apple device is available, tap or click Allow on that device to show the verification code.
For an Apple Account verification email, sign in to the Apple Account on the web and click Resend next to the email address you want to verify.
After switching from iPhone to Android or another non-Apple phone, put the SIM back in the iPhone if needed, connect to cellular data, open Settings > Apps > Messages, and turn off iMessage.
On the same old iPhone, open Settings > Apps > FaceTime, then turn off FaceTime. If you do not have the iPhone, use Apple's online deregistration page.
On Samsung Galaxy phones in the US, open or download Google Messages, tap Set default SMS app, select Google Messages, and tap Set as default. Samsung says Samsung Messages will be discontinued in July 2026, with Android 11 or lower users not affected by that End of Service.
For a work or school account, use the backup options shown during sign-in or contact your administrator when no available method works.
Frequently Asked Questions
Why did my old verification code stop working?
Many sign-in systems replace older codes when you request a new one. For Google, only the newest verification code works after multiple requests.
Can I use a VoIP number for verification codes?
Do not rely on one. Microsoft says VoIP numbers cannot be added for sign-in or verification codes, and Google advises against using Google Voice as the only destination for verification codes.
What should I do if Microsoft blocks code requests?
Stop making repeated requests to alternate emails or phone numbers. Microsoft says delivery can be temporarily blocked after unusual activity or excessive requests, so wait and try again later.
Can backup codes still help if SMS is not arriving?
Yes, but only if you generated and saved them earlier. Google and Instagram both support backup codes as a way to sign in when normal code delivery is not working.
Can I see Android verification texts on a computer?
Yes. Google Messages for web can show SMS, MMS, and RCS on a computer after you pair it with Google Messages on the phone. The phone must stay connected for syncing.
What should I do after moving Microsoft Authenticator to a new phone?
If cloud backup was enabled, open Microsoft Authenticator on the new device before signing in, choose Restore from backup or Begin recovery, then sign in for each recovered account.
