Transitioning from FP2 to FP4



I specifically made the transition from my FP2 to a FP4 and it went with ease (same manufacturer but preferred to use /e/ OS from then). It has no influence in warranty coverage if self-flashed or as Murena purchase.

The new experience for me was just as interesting and intuitive as with my first FP2.
In case you are keeping two SIM cards atm. you will have to “replace” at least one with a modern eSIM
which FP4 will handle. It’s rather a question if your actual provider offer eSIMs as not all do to date.
See here a list which providers by now have been tested with the FP4.
Getting an eSIM to work (if compatible) to me doesn’t look like a challenge and I think everyone can get it accomplished.

The idea of Type-C plug and charging was to (in best case waste reduction) have only one max. 2 charger/cable (per household/individual) for all devices keeping a Type-C plug. Many notebooks stay stationary powered until being traveled with, so the second for true mobile handsets.
Yes there is a difference in charge speed if the cable or charger cannot deliver, hence negotiate high speed charging with the attached device.
But as real scenario, let’s say you keep a portable computer, notebook, tabled etc. in your household with USB-C charger and cable - then use it. It’s just that simple meanwhile.
With quick charge you may full charge the FP4 battery within 1 hour. Without quick charge it may take 2-3 hours.
Using my FP4 every day, I cannot complaint in any way© (pun not intended :wink:). Somehow I have the impression reading through this forum with stock Android there are still some software troubles I don’t experience with /e/ OS. But this doesn’t mean a thing as it was similar with my FP2 on Android.
Updates are coming in regular terms and I never had one that broke something but rather fixed or advanced things.
Still there’s not the FP4 but two models with different memory and internal storage capacities.
So this also makes a price difference you may want to consider in your decision. Atm. they are treated both equally by the manufacturer, no one can tell if some day one version will be preferred over the other depending on updates or so.
Who knows, maybe soon you’ll decide for the upcoming FP5 model.
Good luck with your decision.


i would love to know how you only charge weekly. i have just bought the 4 and have to charge daily. is it that i use whatsapp a lot or is my battery not up to scratch

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I think once per week is only possible when you dont use it much. When you use it thats just not possible and I guess most people charge daily. The more screen on time you have, the more often you have to charge.


phewww… i thought i was doing something wrong for a moment. thanks you angel

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Thanks so much for all this Patrick.

I only have one SIM with my FP2… I’ll look into the SIM card situation with my provider, GiffGaff (who use the O2 network).

Good to hear you’ve had such a smooth time with your FP4, as I’m definitely keeping that option open. I had wondered about the 2 models with their different memory and internal storage capacities & perhaps tomorrow’s announcement may make it clearer if one will be the preferred route going forward. Can I ask which model you chose & why? (Though you do sound as if you have more technical knowledge than me for sure!)
Many thanks, Andrea

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If you’re interested, information about the new FP5 has already been leaked here and here (both in german) and is being discussed in this thread.


You are welcome!
I have chosen for the “big” model as requirements for resources usually increase within time.
There’s nothing afterwards that could be changed or modified on the hardware side. No adding more RAM or internal storage. Some apps won’t install or work properly with external storage (SD Card)
So to have all options for later I have chosen this model.
With USB-C it could also be used as stand alone computer (a docking station easily can be connected which some users and me have tested already).
In case I should ever sell it some day maybe it’s a bit more valued than the “smaller” model.
As it’s an open system users may “thinker” with, e.g. flash other operating system I maybe at some point benefit from the extended resources, specifically RAM.

If your use case is rather basic with main focus on phoning, social media, browsing your might go well with the smaller version. But it could turn out in some years when wanting to resell that it’s not so preferred, just speculating though.
The extra SD slot does give some value if needing space for more data e.g. offline music/video or any other data.
There are just a fraction of apps wanting to run on internal storage. Maybe gamers come to space limits in this concern.
For specific reasons that often cause trouble, SD cards should be formatted as external/portable storage. There are many posts here of users having done different and faced problems after some time.
So that way no more apps can use this extra space for installation should internal storage be filled.
Regards Patrick


Following on this thread, in order to get the accessories for FP5, I would love to get some clarification on specifications.

Fairphone does mention a USB-certified cable,

I have a few USB-C cables lying around, no idea the brand or anything, plus some old chargers that would fit.

Is there any possibility of making any harm to a new phone with devices like that, or will it just make charging slower?

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Just try and use it, all I have work with the FP3 and FP4 and I never checked any specifications.

Because yes it just influences together with the charger how fast its being charged


Thanks so much again, Patrick. Looking at it, I think I too will go for the 8GB/256GB model of FP4.
Warm regards, Andrea

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I also recently went from FP2 to FP4 about a month ago. I ordered the headphone jack adaptor (earbuds don’t work for me) and the cable and charger as all the USBC cables in my house were already spoken for. Generally speaking I’m happy with my FP4.

I flashed it with Calyx OS. My current gripe is the fact I can’t seem to be able to download anything and then open the download, e.g. restaurant menus and public transport maps from websites via Duckduckgo browser, or even from e-mails. Not sure if the documents are simply not downloading, or if they are downloading but being saved somewhere really obscure where I can’t find them. (Not in a downloads folder). If anyone else has come across this, please let me know the solution. (Mods, feel free to move my post to a more appropriate thread if you want).


Have you checked whether (and how) the Downloads are listed in the list of Downloads in DuckDuckGo? You can reach that by searching something, kicking on the three dots, and then selecting ‘Downloads’ from the list (second entry from the bottom). If there’s something in the list it should also tell you whether the download is successful, and you should be able to open, share, and delete downloaded files from there, as long as they haven’t been moved from their original location. Or does only the opening fail, despite the file being listed? What about sharing?

When I click on the 3 dots in Duckduckgo and select downloads, only one download is shown, which is a png file (a picture of a QR code for an airline boarding pass. I forget whether the link to that was from an e-mail or a text message. None of the other items where I clicked to download (I remember trying to download some bus timetables, metro maps from websites where the website made it look like I’d downloaded, but the download itself was nowhere to be seen). The unsuccessful downloads would probably have been pdf format.

What do you mean by that? Did you see an overlay by DuckDuckGo that indicated that Download has started or succeeded or were you simply redirected to another page?

If the problem consistently occurs with PDF files, the problem may not be with DuckDuckGo, but your default PDF viewer. Have you checked whether a default app to open .pdf files/file-links is set? Maybe the opening of that application fails. Have you tried installing a different PDF viewer? Which one do you use at the moment?

Also what about other file formats. Have you tried saving pictures from a website by long-pressing and saving them?

Also have you tried a different browser yet? Firefox mobile maybe?

The pdf software on my FP4 is Mu.pdf. I used Mu.pdf without a problem on FP2. It is not playing ball on FP4. Can you recommend another open source pdf viewer (ideally one available through F-droid)?

The Mu.pdf app opens, it’s just the only thing I can see in it is the boarding pass, not the pdfs I’d tried downloading from Duckduckgo browser.

I have just tried downloading a pdf metro map through Chromium (the other browser on my FP4) and was asked to select where to download to, and was able to download (logically) to my downloads folder.

I can’t see where in Duckduckgo browser I can select where documents are downloaded to.

Have you tried both MuPDF viewer and MuPDF mini?
Also you might wanna clear all defaults of apps that may open pdf files in the system settings.

Have you tried navigating to the downloaded pdf with a file explorer app and opening it with MuPDF from there? Are the files in question in the same folder?

Librera Reader has a reasonable touch UI and an integrated file browser. Its development has been temporarily halted/slowed though according to its GitHub Readme, since its developer is from Ukraine.

You could also try KOReader. It works, but its UI has rather been made for eBook Readers with eInk Displays than for regular mutitouch screens, so the UX isn’t exactly great for regular phones.

Yeah, DuckDuckGo is nice for privacy, but it seems less configurable than other Browsers when it comes to Stuff like that. But afaik it differentiates a few file formats. On my device it put some jpg files I downloaded into ‘Pictures’, while pdf files landed in ‘Downloads’.

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Really helpful to know you’ve been through this transition too.
Can I ask:

  1. was the headphone jack adaptor this one from the FP website? USB-C to Mini Audio Jack Adapter (3.5mm) - Accessory | Fairphone
    (Actually, I realise I’m clear this is the one I need as Urs put the link above, but still interested if it’s the one you got too :slight_smile: )
  2. did you get this cable?
    USB-C to USB-C Cable 2.0 - Accessory | Fairphone
  3. and this charger (I see you are also in UK)
    Dual-port 30W Charger (UK) - Accessory | Fairphone
    Thanks so much, Andrea

Hi AndreaStC - my answer is yes to all 3 questions about the accessories. I bought my FP4 through Your Co-op and bought the charger and cable from them along with the phone. I had to order the USB-C to Mini Audio Jack directly from the Fairphone website as they were not available from Your Co-op.

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Many thanks, MrsLuddite, that’s really helpful. From the wee pictures on the FP website, I couldn’t see how the cable and charger could connect! Now, having done a very wee reccy on the different types of USB connectors, I see you could use your cable with its USB-C port in the charger for fast charging, or you could have the USB-A adaptor hood on and plug into a computer or to the (presumably) slower 18W charge slot on the charger.

[I read somewhere that whilst fast charging very convenient for certain purposes, slow charging is good for battery life - but perhaps that’s just batteries of the FP2 sort…]

Thanks so much again- think I’ll go ahead and order this tomorrow then :smile:

Happy to help AndreaStC. Yes, the cable allows the choice of plugging in a USB C-USB C cable for fast charging, or putting the extra bit on the end for ordinary USB - USB C charging.

I was able to back up my contacts off my FP2 by exporting to a vcf file, copying that onto my laptop with a USB cable, and then importing them onto the FP4. Similarly I used the SMS backup app successfully to copy across my ordinary SMS and Telegraph messages. I copied off the FP2 onto my laptop, and then from my laptop to my FP4 the various files with documents and photos that I wanted to have on my new phone.

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