Compatible smartphones can now plant the Ubuntu Touch OTA-4 update.

UBports Foundationannouncedthe OTA-4 update in a blog post.

Development seems to be quite rapid, as the OTA-3 update rolled out just over two months ago.

Ubuntu Touch running on a PinePhone

Corbin Davenport / How-To Geek

Oddly, notification contents can’t be hidden in the quick options shade.

Charge time estimates also make their debut in Ubuntu Touch OTA-4.

And the Ubuntu Touch dark mode can now be activated from the “Background & Appearance” tweaks panel.

Screenshots of battery level on Ubuntu Touch

Dark mode previously required a third-party app.

Ringtones and vibration get a few improvements in Ubuntu Touch OTA-4.

Just fill out the “Ringtone” field when editing or adding a contact.

Custom vibration patterns, which are utilized by some apps, are now supported by Ubuntu Touch.

Naturally, this update includes some critical bug fixes.

All in all, this is a pretty significant update for Ubuntu Touch.

Those who are already using Ubuntu Touch will find the update in “System configs.”

If you’re interested in trying Ubuntu Touch, check that you have acompatible phoneand download theUbuntu Touch installer.

Note that this is one of several open-source mobile operating systems.

Other options includeSailfish OS,Plasma Mobile, andPinePhone.