In general, the problem of Gmail not working on iPhone usually occurs due to strict security protocols adopted by Google to protect Gmail Users.
For example, you may find Gmail not working on iPhone after moving to a new Town, City or Country or after using Gmail on another device at a new Location.
In such cases, Google may block access to Gmail Account, in order to prevent the possibility of someone else trying to gain unauthorized access to your Gmail Account.
Apart from this, the problem of Gmail not working on iPhone could also occur due to the IMAP protocol not being enabled on iPhone, Gmail service not being accessible via VPN and others reasons.
Gmail Not Working on iPhone
If the Gmail App or your Gmail Account added to the Mail App on iPhone is not working, you should be able to fix the problem using the following troubleshooting steps.
1. Restart iPhone
Starting with a simple fix, restart your device and see if this helps in fixing the problem.
1. Go to Settings > General > scroll down and tap on Shut Down.
2. On the next screen, use the Slider to Power OFF iPhone.
Allow iPhone to completely power off, wait for 30 seconds and Restart iPhone by pressing the Power button.
2. Check Status of Google Services
Sometimes, the problem is due to Google’s Gmail Service being offline or going through problems. You can confirm this by visiting Google Workspace Status Dashboard and taking a look at service status for Gmail.
3. Disable VPN
If you are using VPN, disable the VPN service on your device and try to access Gmail.
1. Go to Settings > General > VPN.
2. On the next screen, move the toggle next to Status to OFF position.
After disabling VPN, you should be able to Sign-in to your Gmail Account.
4. Reset Gmail Captcha
On your iPhone, visit accounts.google.com/DisplayUnlockCaptcha and login using your Gmail Address and Password and follow the on-screen instructions.
If the problem is fixed, you will see “Account Access Enabled” confirmation and you should be able to login to your Gmail Account.
5. Make Sure iMAP is Enabled
As mentioned above, the problem could be due to the iMAP mail delivery protocol not being enabled in your Gmail Account.
1. Using a computer, login to your Gmail Account.
2. Once you are logged-in, click on the Gear icon and select See All Settings in the drop-down menu.
3. On the Settings screen, click on Forwarding and POP/IMAP tab and make sure IMAP is selected.
Note: If IMAP is not enabled, select Enable IMAP option and click on Save Changes.
6. Remove Gmail Account from iPhone
If above solutions did not help, remove the Gmail Account from your iPhone and add it back again.
1. Go to Settings > Mail > Accounts > Gmail.
2. On the next screen, scroll down and tap on Delete Account option.
3. After this, go to Settings > Mail > Accounts > Add Account.
4. On the next screen, select Google as your Email Service provider.
5. On the pop-up, enter your Email Address and Password to Sign-in to Gmail.
6. On the next screen, move the toggle next to Mail to ON position and tap on Save.
After adding back Gmail, you should be able to sign-in to your Gmail Account on iPhone.