There is a bug that is causing this very likely… as said a couple of times now: Sometimes C2 is very very smooth, elsewhen there are micro lags.
I do not think there is a bug, in comparison to Xiii, C2 is slow, really slow. Jolla has advertised it as a reference device, i am almost certain they will not order another batch fron the manufacturer. In a year’s time, once sfos v5.x is stable the next model of s19 pro max whatever will be used as the new model eg C3.
Ps all the above is my wild guess, i might be wrong on that, not on C2 tho.
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I can’t reproduce this, at least I wouldn’t call the drop noticeable. With twenty-three apps running, including heavy hitters like the browser, camera, maps and several heavy Android apps, the frame counter only shows a quick red spike when you move from Home to Events or the other way around, but this isn’t visible to the eye, and the counter stays at 60 unless you switch back and forth between Home and Events multiple times per second. Compared to my Xperia 10 II, which is only running four apps because it keeps kicking everything else out of memory (even though I doubt those four measly apps are really using up all of its 4GB of RAM), yet shows a constant stream of red spikes and hovers around 58 fps even just idling on Home. The Xperia 10 II never goes above 50 fps inside the Settings app, whereas the C2 shows 60 fps throughout.
I can’t compare with the Xperia 10 III, but to me this feels just as smooth as the original Jolla Phone. I think the problems with slowness and lag many are experiencing are caused by a few bugs that don’t always show up (like this) and not so much the phone itself, because otherwise it wouldn’t make any sense that my C2 is almost perfectly smooth and responsive.
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Comparing C2 against a 5 year old, or 10+ year old phone is not a very representative case. Again C2 was introduced as a “reference” device whatever that means. Anyway I hope SFOS 5.x will evolve further and we get more powerful devices in the near future.
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The flash on the C2 gives very uneven illumination. You can clearly see two bright spots from the two LEDs and a dark bsnd across the middle of photos.
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I’ve had my C2 for a few weeks and these are my initial thoughts.
For reference, I still have a J1 which I use every now and then. Battery will just about get through a day, running EOL OS and I have four different colours backs [when cover colours we a thing] .
Also, my daily use device is a Volla, google free German Android device.
Also, I appreciate the work and effort put into building and keeping alive an ecosystem which is not google related. I have bought into SFOS and I fully intend carrying the subscription into year two and beyond.
My thoughts on the C2 :
The hardware is cheap. Very cheap. It feels very light, very plastic and does not inspire confidence that it will survive many drops. My J1 is still in one piece. The screen has a texture of sand, a grainey feel which makes scrolling less tactile. There is no finger print reader. Battery life is excellent.
Sailfish. The screen resolution is big. Is this a hardware or OS thing ? Not sure. I have Fernschriber running [for example] as a Telegram service. There are only seven conversations / contacts on the screen. Once into a conversation, there are very few lines of text on the screen; probably only about 30% of what I am used to on my Volla.
I did a comparison with actual Telegram installed on the C2 through Aurora and that was even worse for screen usage.
Internet Browser : There seems to be a visual lag / flicker / judder when scrolling. I am using the native browser, although may install Vivaldi and give that a try.
Browsing speed seems ok, not brilliant, not terrible. Usable.
I have not yet found a place to change where to download content to. I have put in a 256gig SD Card. Worked first time with no formatting needed. This was excellent. The mount was immediate. I want to put podcast download content to it [for example] but not sure how to. Will investigate.
So far, these are my initial thoughts after three weeks of usage.
I would love to see SFOS 5.X working on a device with much better screen resolution and see what SFOS looks like when it’s sharp.
If SFOS could be ported back onto the Volla, that might be something to see.
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Finally set my C2 today. Came with 55% battery, I charged it up to 100% before I stsrted the setup process.
But I noticed a bug: the battery power level stayed on 55% while charging. So I unplugged the charger, plugged it on again and it showed much more battery power.
GPS inside a building is as bad as on Xperia 10 III, and the whole device feels slower. It’s nice that all three cameras work, but the quality is bad, especially as the choice of the lens affects the photo resolution…
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Androiad apps (like Telegram) scaling can be changed in android app support settings
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GPS inside a building is as bad as …
You do realise GPS is a satellite system? It needs to see the satellites? 
Sure. It just takes too long.
Sure. It just takes too long.
Sorry, I don’t understand. If you are IN a building it’s never ever ever going to work. It can’t. Not possible.
If you’re really talking about being outside where your device can receive data from the sats that’s another issue.
@Cryx Location inside a building works with cell towers and wlan’s, not satellites. Therefore not possible when Jolla has no contracts with GAFAM + network operators.
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Sorry, I’ve built over a 120 mobile networks around the globe. I do know how some things work.
THE phrase used was GPS.
Global Positioning System. Satellite based. Nothing to do with cell towers.
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And Cryx complained about not working GPS inside buildings and thought it should work. Therefore i wrote the post.
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Hence why I gave you a heart
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Completely inside a building is a problem when you don’t get any signal, sure. That wasn’t the point. But standing at a window gives you satellites in gpsinfo, but especially in my first try it felt longer to get a number of satellites than on 10 III.
Please be aware that all this is my first impression from the first hour of C2 usage, but compared to the 10 III the Sony is the better device.
Nevertheless I will try Sevens GPS tweaks soon…
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Thanks for the feedback. I did the easier thing and sent the device back!
The Sony was great, the Nokia N9 was out of this world.
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This is the GPS tweak:
File is: /vendor/etc/gps.conf
As devel-su, make backup: cp /vendor/etc/gps.conf /vendor/etc/gps.conf.bak
While Location is turned off, edit the file: vi /vendor/etc/gps.conf
In line 26, change NTP_SERVER = time.google.com to NTP_SERVER = ptbtime1.ptb.de
In line 70, change NMEA_PROVIDER=0 to NMEA_PROVIDER=1
Save and exit editor, start Location in Settings, launch GPSInfo and watch the result. Be sure to have good reception conditions.
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Maybe it took longer because the phone didn’t have up to date ephemeris and almanac stored before hand, and the phone had to wait to receive those from the satellites?
Strange. I don’t have that file.
For a test GPSInfo did get a lock but I haven’t use navigation yet.