@Lakotaubp thanks for your help. I've just updated to 327 and tried everything you said but unforunately i can't get it to work yet. both of my sim cards are working on slot1 but not on slot2.
it could be a hardware issue as you said, i don't really want to flash android just to test it.
i checked the pins inside the phone and they look fine.
EDIT: I noticed it my device only shows the 1st slot IMEI when I dial *#06#
same on Settings > About, hope this can be helpful
If you talk about VoLTE wich work only with 4g, there is no support for it on UT for now, and VoLTE is the only dialing way with 4g so any phone that support 4g but not VoLTE, like mine, will never be able to dial in 4g.
Normally, phone should swich to 3g or 2g for dialing, like mine is doing, unless your provider force 4g and VoLTE...
I'm on a different device so I'm not sure how relevant this is, but there are a few settings for vibration on my device.
In 'Sound', in the sub heading 'Phone calls:' there are settings for 'Vibrate on ring' and 'Vibrate in Silent Mode', in the sub heading 'Messages:' there are settings for 'Vibrate with message sound' and 'Vibrate in Silent Mode', and in the sub heading 'Other sounds:' there is a setting for 'Other vibrations'.
Also in 'Language & Text' down the bottom there is a 'Keyboard vibration' setting.
I was getting the odd unwarranted buzz here and there until I turned off the 'Other vibrations' and 'Keyboard vibration' settings.
@dobey Yeah I got it a bit misleading, what I wanted to say is:
Hardware decoding will help only for those formats that were implemented at the time the device was released, logically hardware wont change with updates after that. On the other side, it could theoretically be some kind of ASIC or whatsoever that the vendor could load with new firmware so that it can learn new formats later.
So because we cannot load new proprietary codecs into firmware for the decoder ourselves we can just take whats either there in hardware or firmware. For some devices you will find the supported hardware codec lists somewhere.
If Google comes up with VP9, 10 whatsoever new shiny compression algorithm or your load your loved MKV movie onto the phone in both cases your screen might stay black with mediaplayer. If there is no suitable codec found, hardware or software, it wouldnt play. On the other hand, it could sometimes decode in software, but you notice the device getting hot, video could be stuttering etc.
Our older phones probably lack some decoders already, @pavelprosto does that answer your case in some way? 🙂