Gmail Not Syncing on Android: 6 Fixes, Fastest First

When Gmail is not syncing, not refreshing or not updating on your Android phone, the cause is almost always one of six things. The first three are settings you can change in under a minute. The last two (clearing cache and clearing app data) are the drastic options, so this guide runs the fixes cheapest-first and stops you before you reach for them.

The six fixes, in order: the Sync Gmail toggle inside the app, Android's account-level sync, Gmail's battery mode, free storage on the phone, clearing the Gmail cache, and clearing Gmail's app data. Most people find the answer in the first three.

Gmail not syncing on Android: quick fixes#

If Gmail on your Android phone stopped receiving mail, check these three settings before anything else. Google notes that it can take up to 15 minutes for Gmail to sync after a change, so give each fix a few minutes before you decide it did not work.

Gmail says "Primary sync is off" or "Auto-sync is off"#

Some Gmail versions show a banner or grey bar such as "Primary sync is off", "Inbox sync is off" or "Auto-sync is off. Tap to turn on". The wording varies by Gmail version and Android skin, and Google does not document the banner text, but the meaning is consistent: Gmail is not allowed to fetch mail in the background.

Tap the banner first. If it only reopens the same screen, switch on Sync Gmail in the app (Menu > Settings > your account > Data usage), then switch on Google account sync in Android Settings, as in the table above. The banner usually clears once both are on.

If auto-sync keeps switching itself back off, the full walkthrough is in Auto-sync is off on Android. The most common reasons are battery saver, data saver or a phone-maker app killer, all covered below.

Before you start: quick checks#

Confirm your connection works by loading any page in a browser. If Gmail syncs on wifi but not on mobile data, jump to the callout later in this guide.

Check Google account storage. Gmail, Google Photos and Google Drive share one pool of storage, and Google says that once it is full you cannot send or receive messages. That is a server-side limit, not a phone setting, and clearing the Gmail cache will not fix it.

Check whether Google itself is having a problem at google.com/appsstatus. If the dashboard shows a Gmail incident, no setting on your phone will help. Wait and check again in 30 to 60 minutes.

How to fix Gmail not syncing on Android: six fixes, in order#

Work through these in order. Menu names and paths vary by Android version and manufacturer, so each step describes the setting and its purpose, and the table below shows the usual paths by brand.

1. 1

   Turn on Sync Gmail inside the app

   Open Gmail, tap Menu (the three lines), then Settings, then your account. Under Data usage, make sure Sync Gmail is ticked. On some Gmail versions the option sits directly under the account name instead, so if you do not see a Data usage heading, scroll the account screen for Sync Gmail. When this is off, Gmail stops fetching new mail for that account. To test, swipe down from the top of the inbox to refresh by hand.

2. 2

   Turn on Android account sync

   Open Android Settings and find Accounts, which is labelled Accounts and backup, Passwords and accounts, or Users and accounts on different phones. Tap Google, then your account. Make sure Gmail is switched on in the list of sync items. Google's own help page also gives a path through Settings > About phone > Google Account > Account sync, where you can tap More and then Sync now to force a full sync. Both the in-app toggle and the Android-level sync must be on, because either one being off is enough to stop mail arriving.

3. 3

   Set Gmail's battery mode to Unrestricted

   Open Settings > Apps > Gmail > Battery (App battery usage on recent Pixel versions) and choose Unrestricted. On OnePlus and some other phones the option sits at Settings > Battery > Battery optimization > Gmail > Don't optimize. When Gmail is on an optimized or restricted setting, Android may pause its background work soon after the screen turns off, so new mail only appears when you open the app. Also turn off Battery Saver while you test, as it limits background sync for every app.

4. 4

   Free up phone storage

   Google states that if your device is low on storage, the Gmail app does not sync. Open Settings > Storage and check the free space. If it is nearly full, uninstall unused apps, delete downloads, or move photos and files off the phone. Gmail normally resumes syncing on its own once there is room, and Gmail app storage on Android explains what the app itself keeps on the device.

5. 5

   Clear the Gmail cache

   Go to Settings > Apps > Gmail > Storage (Storage and cache on some phones) and tap Clear cache. This removes temporary files without touching your account or your mail. Open Gmail afterwards and give it a minute or two to reconnect. A corrupted cache is an uncommon cause, but this step is safe and quick when it is.

6. 6

   Clear Gmail's app data (last resort)

   On the same Storage screen, tap Clear storage (also labelled Clear data). Google warns this can erase drafts, your signature, ringtone and other app settings stored on the phone, so copy any unsent draft text first. Your mail itself stays on Google's servers. Restart the phone, open Gmail, sign back in and wait a few minutes for the first sync. This fixes a damaged local database or a broken sign-in token.

Gmail sync settings on Android: where they are, by phone brand#

The three settings exist on every Android phone, but the menu paths differ by manufacturer. Use the Pixel column as your reference if your phone is not listed, and treat all paths as a guide, since labels shift between Android and One UI versions.

Phone makers add their own background limits on top of stock Android, which is why a Samsung or Xiaomi phone can still block Gmail after you set it to Unrestricted. For the full per-brand list, see battery optimisation by phone brand.

Gmail not syncing on a Samsung phone#

Samsung phones have two separate layers. First set Gmail to Unrestricted under Settings > Apps > Gmail > Battery. Then open Settings > Battery > Background usage limits (under Battery and device care on some One UI versions) and check that Gmail is not on the Sleeping apps or Deep sleeping apps lists. Adding it to Never sleeping apps stops Samsung putting it to sleep. The names and layout vary by One UI version, and Samsung warns that apps on the Never sleeping list can use more battery.

Samsung also keeps its own Accounts and backup section, so check that Google sync is on there. If you use Samsung's own mail app rather than Gmail, the fixes are in Samsung Email not syncing.

Gmail still not syncing: what to try next#

If all six fixes have not worked, try these before reinstalling or contacting Google support. (If the problem is in an Outlook account rather than Gmail, see Outlook not syncing on Android instead.)

Reduce the days of mail to sync. In Gmail, go to Menu > Settings > your account > Data usage and look at Days of mail to sync. A large value makes each sync heavier, especially on a slow connection or a new large account. Try a lower number such as 30 and raise it again once the app is stable. See Gmail days of mail to sync for what the setting does.

Remove and re-add your Google account. Go to Settings > Accounts > Google > your account > Remove account, then add it again under Add account > Google. This fixes sign-in tokens that your phone accepts but Google rejects. Everything re-downloads from Google, and no mail is lost.

Uninstall Gmail updates and reinstall. On most Android phones Gmail is a system app, so you cannot fully remove it, but you can roll back to the factory version via Settings > Apps > Gmail > three-dot menu > Uninstall updates. Then update it fresh from the Play Store.

"Gmail sync is currently experiencing problems"#

This message means Gmail could not reach Google's servers or complete a sync. Check your connection first, then check google.com/appsstatus for a Gmail incident. If Google reports one, the only fix is to wait, because repeatedly clearing the cache will not speed up Google's recovery. If the dashboard is clear and your connection is fine, restart the Gmail app and the phone, and work back through the six fixes above.

A different route: one inbox that does not hinge on phone settings#

The steps above fix the sync problem on your phone. If you would rather manage Gmail from a client that does more of the work, we build AI Emaily, an AI-native email client that connects to Gmail and runs in your phone's browser today, with a native Android app coming.

In Copilot mode the AI drafts replies in the voice you set in your Personal Context, per-client profiles included, and you approve every send. Autopilot, on the Autopilot and Team plans, handles routine mail within rules you define, with undo and an audit trail. Pro and Autopilot both start with a 7-day free trial. Keep the fixes above as your first move, because a broken sync is a settings problem, not a reason to switch.