I have an F5122 and in my case, the loss of Wifi connectivity has no definite pattern that I can see: Sometimes it would reconnect when getting back in range and sometimes not, apparently not dependent on the duration I was connected or out of range. When wifi does not reconnect within seconds, rebooting is the only way to fix it (and it works 99% of time).
Much less often (every couple of months, perhaps), I experience a loss of cell connectivity : the phone would suddenly declare it has no sim card, requiring a reboot to recover. Although infrequent, this later issue can indeed lead to missed calls, as it is entirely up to you to realize you are out of reach (in my case it can last hours...). It's definitely not an electrical problem but really a software problem which was already present when I was running SailfishOS on that phone and that is linked to my carrier using a form of "roaming" with another carrier where it lacks covering. Besides this rare issue, calling and receiving works fine for me and those who call me.
However, unlike in you report, my connectivity issues do not prevent launching the applications I use (camera, browser, email...). But of course, apps needing connectivity do not function properly. For me, commands entered in the terminal perform as expected.
Finally, I'm glad you report here the rebooting issue because I have had this issue too for a few months, after an update (on the candidate channel). When asking for a shutdown or a reboot (most of the time for restoring wifi connectivity) the screen goes black and the phone freezes in that state (power button is inactive unless volume up id pressed simultaneously). However, if you wait long enough (7-8 min?) the phone eventually reboots. I guess some process does not honour the termination request and the kernel waits a long time before forcefully terminating it.
@777funk No, I just meant don't expect good and smooth experience if you heavily browse the internet. I personally have many tabs always open in the browser and even 8GB of RAM on an S10 is starting to struggle with Twitter always open 😅 Xperia X is fine if you don't use it much for multitasking and heavy tasks 👍
I had the same problem until I found out that the installer wants the complete path to the zip file, not to the extracted .img.
This could be clearer in the documentation.
@AppLee Thy for the hint. I didnt know that app. Looks nice. The sound sounds quite flat ... with clicking noises in the hights (e.g. hihat). Don't think hat has something to with the speakers, because the soundquality is also poor when I connect suzu to my bose-box.
@zilladog I too am a little late to this forum post. I just stumbled upon this as I too am trying to figure out what to do with my Xperia X. My recent experience with T-Mobile suggests that VoLTE is required.
I used a Sony Xperia X (F5122, dual SIM version, with an outdated Sony-supplied Android) with T-Mobile in the US for about two years (2018-2019), and then I moved to Canada, where I've been using the same phone for the last two years with a Canadian operator. I had also cancelled my old T-Mobile plan.
When I visited the US last month (November 2021), I bought a pre-paid T-Mobile SIM, assuming that the phone will continue to work with T-Mobile. I could even activate it at the store, using the same phone. But an our or later it was dropped out of the network. I tried switching SIM slots, rebooting, and so on, but none of that worked. So I called customer support (from another phone, of course) and learned that the Xperia X is probably no longer supported. I suspect this is because T-Mobile had dropped support for phones that do not have VoLTE, such as my F5122, by August 2021 or so.
It seems that certain non-US versions of the F5122 Android firmware have a toggle switch that can probably enable VoLTE, but I do not want to go down that particular rabbit hole. Perhaps the next time I will give UBPorts a try!
@ilija_zmaj I have one too since today! It's a pretty sweet device... I found one other buglet:
if you are using the camera app and zoom in, a line of weirdness that looks like distorted characters appears on the middle of the screen. It does not show on the pictures, so it's no biggie.
@lduboeuf Normally not. The whole purpose of this message is that it cannot be supressed by a malign firmware or flash. @stanwood it would be counter-beneficial if that would be simply erasable by a flash command. Normally those images are embedded in the bootloader, and so one would need to hack the whole bootloader and replace it.
Thats a quite dangerous task, it might hardbrick your phone.
Maybe some day we find a way to re-lock boot loaders 😉