DotOS V2.5 Installation with TWRP Recovery


I want to install DotOS(v2.5 preferred) on my FP3 but I couldn’t find anything about this topic on the internet. I’d prefer to use TWRP Recovery, but it isn’t a must-have.

Thanks for your Help🙂

Welcome to the community forum.

An internet search for dotos leads to … which has a link to … which doesn’t list the Fairphone 3/3+ as supported … but back on it has “Frequently asked questions”, among them …

"Q: My device is not supported! What should I do?!

A: First reason can be that our development team doesn’t have your device to support it or we no maintainer applied for this device. You can always use our GSI builds if your phone supports Treble Project."

… so, back to, and indeed it has a link to “GSI (Universal Builds)” with the choice of A64/ ARM/ ARM64 … an internet search for this leads to, which says …

“If you are installing GSIs and you want to know what type of GSI to choose then install an app called ‘Treble Info’ from the play store.”

… which should then help with the question of which file to download once the corresponding choice of A64/ ARM/ ARM64 is made at - GSI (Universal Builds).

As for how to install … an internet search for install gsi brings up



Thanks😁. And no, I meant 2.5, Ilike the old UI much better than the new.

Ah … Android 8, September 2018 security patches … I see, an enthusiast for the UI and a refined collection of assorted security holes :slight_smile: .

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Well, 5.2 isn’t that much better: release date October 2021…

But no problem, you are safe, their FAQ says:

Q: Is dotOS safe?

A: Firstly you’re unlocking bootloader which is opting to lose security features from OEM [Manufactures]. if that’s not your concern, rest assured you’re totally safe. we have covered all security patches released by google and several security enhancements to keep you protected.


… unless you choose the GSI, which currently we didn’t update for a year and change. But we will not say that out loud :slight_smile: .

Oh, and I forgot …

“You, as an app developer, can install and run the latest Android GSIs on a variety of existing Android devices, and in different Android OS release stages including Preview and Beta phases, to perform app testing!”

“Android Generic System Images (GSIs) are for app developers to perform app validation and for development purposes.”

“GSIs are used for running VTS and CTS-on-GSI tests. The system image of an Android device is replaced with a GSI then tested with the Vendor Test Suite (VTS) and the Compatibility Test Suite (CTS) to ensure that the device implements vendor interfaces correctly with the latest version of Android.”

GSIs may work nicely as a daily driver on a device, or they may not, it’s not their main purpose.

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The developers have probably abandoned the project and it is no longer maintained, right?

It doesn’t look entirely dead. They have 6.0 beta versions out for some supported devices dated September 2022 at least.

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