Also check the following settings:
On your iPhone, go to: Settings > Do Not Disturb:
- Turn off Manual;
- Turn off Scheduled.
On your iPhone, in the Watch app, go to: My Watch (tab) > General > Do Not Disturb:
When viewing the time on your watch, swipe up on the display, then swipe left / right to the Settings Glance:
- Check that Do Not Disturb is not turned on (button with the moon icon).
- Check that Silent Mode is not turned on (button with a crossed out bell icon).
On your iPhone, in the Watch app, go to: My Watch (tab) > Sounds & Haptics:
- Check that the Alert Volume is in your preferred position;
- Check that Haptic Strength is set to the middle or far right hand side of the slider;
- You may also wish to enable Prominent Haptic (to receive pre-announcements of common alerts).
On your iPhone, check that both Bluetooth and Wi-Fi are enabled:
- Settings > Bluetooth, Settings > Wi-Fi.
Also check your settings for Messages and Mail:
On your iPhone, In the Watch app, go to: My Watch > Messages - check your settings.
- For example, you might set this Custom and then, under Alerts, enable each of Show Alerts, Sound and Haptic.
On your iPhone, In the Watch app, go to: My Watch > Mail - check your settings.
- For example, you might set this to Custom, then under Alerts select Show Alerts.
- Also, tap on your email account to enable each of Sound & Haptic.
It may also help to restart both your iPhone and your watch. Turn both devices off together, then restart your iPhone first:
- To turn your watch off: press and hold the side button until you see the Power Off slider; drag it to turn off;
- To turn it on: press and hold the side button until you see the Apple logo.