Installation of e/OS on CMF Phone 1

[Teo2002]

Hello,

Today I tried unsuccessfully to install e/OS on my new CMF Phone 1. First with e/OS Installer, on Windows and MAC. The software was downloaded but always stopped during the boot process. I installed ADP and Fastboot, but still no success. I have read many such cries for help on the internet; unfortunately, it does not seem to be so easy to install. The documentation is very incomplete, the usual mess. Does anyone have any tips on how to achieve this without having a nervous breakdown?

Best regards,

Jens

[Jets]

Jens, you mean you installed adb correct… What was the search term you used on the internet with the many cries for help?

Have you tried the command line method? Did you first enable developers mode on the phone , enable OEM unlocking an d USB debugging?

[Catalin]

I just install e os on CMF phone 1 white command line on linux.. I tried to installed step by step on the e os site but didn’t work. after unlock EOM..USB debugging and put USB in file transfer power off your phone and then keep pressing power button and volume up button and select fastboot mode and use the command bline to innstal e os and you good to go…sorry for my English😁

[poveropaoletto]

I just bought a cmf 1. documentation is not incorrect. documentation is fake. it’s a copy-and-paste of some standard crap.

if you buy a cmf 1 on the market, follow the instructions, upgrade the firmware, you won’t be able to enter developer or debug mode. you won’t find a way. so you won’t go one step beyond. I don’t know if you can work it with the original 2.3 or so ‘nothing os’ (nomen, omen) because firmware update is not reversible.

I can understand murena needs some intake, but some people would like to try before paying.

thank you all

[piero]

Hello @poveropaoletto, Welcome to the /e/ users forum.

.

i can’t understand what you say :

@poveropaoletto

follow the instructions, upgrade the firmware

i can’t see that in instructions : Install /e/OS on a Nothing Nothing CMF Phone 1 - “tetris”
.
if you need to downgrade you firmware base to Android 14, you can follow : GitHub - spike0en/nothing_archive: This project indexes and preserves full firmware, and OTA update links for Nothing and CMF devices, sourced directly from official OEM servers while generating unmodified stock OTA images.
.
to install /e/, follow this :

@piero

.

in 3 copy / paste actions !

.

because even well illustrated, the “web-installer” often don’t work,

and because the official documentation is imbuvable for a new user.

.

.

here we take the Fairphone 6 as example,
but it is the same logical and quite the same process for all the devices that have :

• only "IMG-e-xxxxxxxxxxx.zip" file on their download page,

where you can read :

@piero

Your Stock OS Android version, must be the latest available relative to the /e/OS build you want to install → not higher !

…

[poveropaoletto]

thank you. browsing I found: Smartphone Selector , I selected Install /e/OS on a Nothing Nothing CMF Phone 1 - “tetris” , clicked install,

at the bottom of the page I saw the yellow warning: Prima di procedere con l’installazione, verifica se è disponibile l’ultima versione del firmware Android per il tuo dispositivo. (before proceeding check last firmware) so I upgraded. I really thank you but I tried on a zenfone, failed, retryed and now downgrading and restarting again, it’s too much for me. Thank you again, Paolo

[piero]

@poveropaoletto

now downgrading and restarting again, it’s too much for me

also there is yet an Android 15 based build, from the user community, not from /e/

[UNOFFICIAL BUILD] Nothing CMF Phone 1 (tetris) for eOS-a15 3

Nothing CMF Phone 1 (tetris) for eOS-a15 3.1 e-3.1-a15-20250803-UNOFFICIAL-tetris.zip https://sourceforge.net/projects/eosbuildsronnz98/files/OtherSmartphones/e-3.1-a15-20250803-UNOFFICIAL-tetris.zip/download Please see sources and install instructions including recovery here: https://xdaforums.com/t/rom-15-tetris-droidx-ui-official-stable-aosp.4749787/ Use it at your own risk!

[HOWTO] an Unified Install Guide Project for /e/

posts are editable as a Wiki. Here is the summary : (1) install the appropriate Flashing Tools (2) allow “Non Vendor OS” to be installed on the device (3) Check the communication between the PC and your smartphone (4) Download a custom recovery manager (5) Download an /e/OS build (6) Unlock the Bootloader (7) Flash a custom recovery manager on your device (8) install /e/ from your computer, using the “adb sideload” method or (9) Install /e/ without computer using the “Device-Storage…

[eguy]

Hi

I am trying the same install.

I did update everything first and note it is at Android 15. Could this be a/the problem?

I’ll have a read through the post and link you gave us (thank you) and try taking it back to 14.

So far have attempted 7 or 8 times and it all stops. Sometimes saying my device is not connected even though it is. Sometimes saying it can’t find phone ‘that’s suitable’.

Tried different operating systems, different computers, different chromium browsers and also Terminal/Command Line

Do you think being Android 15 is the issue?

All the best regards

Peace

[piero]

@eguy

it is at Android 15. Could this be a/the problem?

potentialy yes for installing /e/OS-a14
but not for installing /e/OS-a15

@eguy

and also Terminal/Command Line

that need fastboot and / or adb to be present in the system
also, windows needs additionnal drivers that are tricky to install via windows update → optionnal updates [Solved] Windows does not see my phone in Fastboot mode

[aibd]

Hi @eguy I have not checked this properly for recent updates here but I think it would be worthwhile https://xdaforums.com/t/rom-stable-tetris-14-e-os-for-cmf-phone-1.4692763/.

• (Might be faulty memory but one might find on this forum in early days users finding that the device was tolerant of change of Android version Rollback android 15 to android 14 - #8 by jamio and further comments and successes ( – but things change.)

Sounds like you are using eosinstaller.

[piero]

@aibd

Might be faulty memory but one might find on this forum in early days users finding that the device was tolerant of change of Android version.

so do i…
downgrading stock android version using the /e/ IMG file has been reported as working

[eguy]

@piero and @aibd

Thank you both for your replies!

(We ‘met’ some months ago when I was having problems with my Samsung which is now cut off here in Australia due to the VoLTe network upgrades and regulations which rendered my Samsung obselete, which is why I have bought a Nothing CMF Phone 1)

It seems probably best if I try to ‘roll back ‘ to Android 14 so I can set up the official e/OS for the phone.

I have looked at the link from @piero but I will need a clear head and energy to tackle it well, as I’m not long out of hospital and still not 100%

For me at present, the easiest and best method I want to use. I’m sure you understand.

For now, I’ll go through your kind and helpful replies and get my head around it.

@aibd i shall eagerly look at the link you shared.

By the way, I only use Linux based systems. Can handle Terminal provided it is free of presumed guesswork. Not the sharpest knife in the block! I found the Git page a bit overwhelming as it is quite thorough but some stuff I am not familiar with.

I really appreciate both your help. So good and a fine example of the wholesome community at e/OS.

Peace

[aibd]

@eguy

I only use Linux based systems.
…
I found the Git page

Tip: For Windows users, we advise to use Git Bash

To help understanding the layout of the page, please notice that the Git bash element is just a way to make a Windows PC behave like Linux. So just disregard that element.

[poveropaoletto]

You’re too kind. I’ll try harder next time, and I’ll be more careful. Thank you.However and somehow it seems someone other has faced this minor issue so I hope my troll posting may be useful. Other people can find your help for downgrading, or installing on android 15. Grazie, Paolo

[eguy]

@aibd& @piero

Hi again ,

Please can you help me? If this thread closes, perhaps message me or help me start a new relevant thread.

I can not find any direct and easy to understand place via the links you gave to downgrade or roll back to Android 14 from Android 15.

I feel rather stupid but confess that I am having a really hard time finding anything that walks me through doing it.

Too much guess work for me. I am sorry but I really would appreciate your help. Please

Peace

p.s. I have read through so many pages and looked and read links on pages. Bookmarks galore and near total brain burst trying to understand it. It should be simple but I am unlearned.

On top of this I am also being affected by side effects from medication I am needing at present which make thinking a bit blurry.

Thankyou both

[aibd]

I don’t have first hand experience of the phone but those links I included, one from the original developer, all say no need to roll back – is that the only problem?

• Usually, it is “wrong” to try to roll-back Android. The method to do a rollback often involves the manufacturers Fastboot ROM made for the purpose. In the case of tetris the /e/OS ROM is a Fastboot ROM so it is indicated that it is competent.

I always ensure I have a copy of the manufacturers reinstall ROM and install instructions, if only to aid confidence in proceeding into the unknown.

[eguy]

@aibd

Thank you

Yes, that is/has been my problem.

Can you please let me know how to get the manufacturer ROM? That would ease my mind a huge amount.

Again, thank you so much for your time and help. It makes a real difference.

Peace

[piero]

In conclusion, look like the general rules regarding downgrade exceptionnally don’t apply to this device,
You can have a go direct with /e/-a14 using the install script :

@piero

in 3 copy / paste actions !

.

because even well illustrated, the “web-installer” often don’t work,

and because the official documentation is imbuvable for some new users

Then if you prefer Unofficial-15, use the traditionnal method : [HOWTO] Upgrade my /e/OS to major Android version without loosing /data

[eguy]

trying the e/OS Installer, when i try to connect to phone i get:

“Error on step: device-detection

Cannot execute command connect adb
The device is not connected Failed to connect: Cannot connect ADB Cannot read properties of undefined (reading ‘deserial’)
Proposal: Check connection and that no other program is using the phone and retry.”

very frustrating.

sees phone, i select it, press connect and get that message.

trying command line, gets nowhere even though i follow steps. Get to “adb reboot bootloader” and nothing, except once but no further.

keeps telling me no adb command etc.

been through all adb set up, again and again.

@piero I shall try that first link.

it’s nearly half past one in the morning (again) . Don’t understand why it is not working.

reset phone to factory settings before starting.

if your link doesn’t help I might have to try another computer after loading a completely different linux OS onto it. Shouldn’t have to do all this.

anyway, thank you. I shall try that link now

Peace

[aibd]

You have a number of different instruction sets. You probably do not need to do more reading but this hashtag eosinstaller which I gave before shows that it does not work for many. Troubleshooting the installer is probably not what you need.

Much better tomorrow tell us if or where you get stuck with the regular install instructions.

Use @piero’s first link, augmented if required by Install /e/OS on a Nothing Nothing CMF Phone 1 - “tetris”. (His second link is for a later Upgrade if you chose to do that.)

@eguy

adb set up, again and again.

Did you work out the use of

adb devices

in regular phone mode or Recovery … and

fastboot devices

when the phone is in Fastboot mode aka Bootloader? The sole purpose of those commands is to get the phone to identify itself and its state so you know that you have a real Android connection.

I suggest not to proceed till you can do those.