[Sony Xperia X Compact Questions & Answers] SornyPanatronic:
I have an Xperia X Compact F5321, about a year and a half old. When the issue started it was running Android 7.0, software 34.2.A.2.47 and then I updated through the night like 6 times to 34.2.A.2.69 etc until 34.3.A.0.252, the last 7.1.1 version.

No luck there.

Phone is not rooted but it was flashed with UK version to enable fingerprint reader, as soon as I got the phone.

A couple of days ago I started to notice that 4G/LTE wasn't working very well. Trying to access sites on Chrome rendered a DNS resolution error and it only worked after turning airplane mode on and off.

Several hours later the whole cellular function of the phone suddenly stopped working (calls, SMS, 4G). At times it read that there was no SIM inserted (though there was one), but most of the time it stated that there was zero bars (empty triangle).

Whenever I boot it now it will read "no SIM" for a long time until it gets to zero bars.

I got a new SIM card but it's still happening.

I looked into this and I found out about the #*#*4636*#*# and *#*#7378423#*#* menus , as well as some other users with the same issue which they haven't been able to solve, including two in this forum who have not been successful.

Checking out phone info it says that signal is -1dBm and 99 ASU and radio is off.

Full readout is below.

It shows the cellular radio power as turned off every single time. If I turn it on, leave, and go back to the menu, it's off again. It's constantly getting turned off, automatically.

So it would seem the cellular radio is not working, I cannot get it to stay on, and that's why I don't have a signal.

At the same time, since for some periods of time it isn't recognizing the SIM card, it could be that the card reader has become faulty out of the blue.

Or perhaps the baseband chip isn't working.

BTW, if there's an app or method to check hardware level issues, I'd like to give that a shot.

I do drop my phone quite a bit (has a case) but there were no drops the day this started happening.

I don't know if it's a hardware or a software issue but I'm inclined to think it's hardware.

I tried changing the preferred network type between global, LTE, GSM, WCDMA, Unknown, etc. but those choices don't stick and it doesn't help. I messed around with several of those settings to no avail.

I've tried updating the software but not the software repair so far because I want to delay that as much as possible while I diagnose the issue.

Same goes for taking it to a service shop.

Any ideas?

Phone number: unknown

Current network:

Signal strength: -1 dBm 99 asu

Voice service: Radio off

Data service: Disconnected

Voice Network Type: unknown

Data Network Type: unknown

Voice Call Status: idle

Roaming: not roaming

Set preferred network type: LTE/UMTS auto (PRL) [I've tried setting it to other options, doesn't help. Always reverts to that default]

Ping tests for IPv4 and IP v6: Fail(2)

HTTP Client test: Fail: IOException

Data Connection Real-Time info:

Message waiting: false

Call redirect: false

Data Sent: 0 pkts, 0 bytes

Data received: 0 pkts, 0 bytes

Number of PPP reset since boot:

Cellular Radio Power toggle: is off every time I access this diagnostic. Turning it on does not change the above info, and it turns off as soon as I leave.

VoLTE provisioned: off [turning it on doesn't help]

SMSC: blank

TOGGLE DNS CHECK 0.0.0.0 allowed [changing this doesn't help]

Cell Info Refresh rate:

Disabled [starts this way every time I access it, changing it doesn't stick and doesn't change the above or below info]

Cell Location info: just unknown or LAC and CID = unknown

Neighbor cell info: no neighboring cells

All cell measurement info: