I do not need stereo and I only detected by the way that audio came out from only one of them. I was more concerned about, that the other somehow failed already. But, no. And so it's fine. Thanks for the reply.

My BQ E4.5 runs the latest UBports OTA. Yesterday I detected(!) (i.e. the problem is perhaps older), that audio comes only out from one of the two speakers in the bottom of the device. One can easy test this by just taping with the finger first one and then the other and listen to the level of the audio noise. First, I thought in a hardware issue (the devices are now more than 4 years old), but the same is also true with the E4.5 of my son which still runs the latest Canonical OTA.

Any ideas?

Curious, why was the last post deleted and the user banned?

May be. But me and my family we run four devices BQ E4.5 (I in person since 2015 as my daily driver) and I do not like, from the management point of view (my other family members are not Unix experts) any exotic animal in my farm.

Well, the first exotic is knocking doors scheduled for next months: a real OpenSource device: the L5.

I have had the same issue with one of my E4.5 exactly a year ago: half of the scren went unresponsive. I pulled out the SIM and changed its PIN using another phone and so was able to unlock it. Later I configured another E4.5 to AP mode, the broken one brought up Wifi and I could SSH into it to make a final backup to its SSD. Then I sent it to BQ for repair for 120 euro, transport included. They swaped the screen and returned the broken screen as well.

Is there a way in the profile settings to remove the account and all own posts?

Today I went to a big tech market to buy a new SD card for my BQ E4.5. I bought a SanDisk microSDHC UHS-I 16 GByte. When I pulled it our from its plastic cover it was easy to open and I already though that someone opened this plastic once. I plugged it in and ... it contained pictures in a DCIM dir, a file Kontacts.vcf and more stuff, some Android directories etc. I returned it to the shop and they were surprised as well and gave me a new one, now really empty.

What I'm asking me: who is so stupid and returns such SD to the shop, even hang it into the place where new cards are (or maybe the shop staff did so) but in any case without at least formatting the SD? And why at all? Or is this some new attack vector distributing trojans or malware on SD cards through shops?

Additional question, which was not moved from Support to off-topic, but deleted: Do we have any anti-virus and scan software in UT?