I've transfered text messages from my LG to my laptop lots of times. You need LG Optimus to do it. It can be downloaded free from the LG website. Then use a USB cable to connect your mobile to your pc. Once its connected, from the tool click on messages. Then after all your texts have loaded you can copy them into your pc documents. Hope that helped :)
You can try MobiKin Assistant program, which can transfer sms from android computer.
Anyone searching for this, you can download an old version of the mi home app from third party websites and it will let you add unsecured. Search for "
Mi Home 5.1.16"
The reason people want to do this is to extend cheap 'toy' FPV drone range - they are not connected to internet and just using Wifi to stream video from the toy drone to the device so security isn't much of an issue that it would be.
VoLTE is actually a carrier service and both the phone maker and the carrier need to work together to enable it. Not having VoLTE shouldn't cause call drops, but since LTE network cannot take voice packets, the phone needs to fallback to 3g/2G mode during calls, which can cause the line to be interrupted.