Hi, I started using the TCL phone recently I hade a few problems that I found solutions for maybe it can be beneficial for other so ill post it here.
First my data didn't work I was thinking of asking here but didn't get to it until I once connected to a free Wi-Fi and when I disconnected from it the 4g LTE symbol came up. So if you have this problem try connecting to Wi-Fi.
I also didn't like that the voice access was making a notification all the time. I found that when you klick with the mouse on the top of the screen there will be a drop down and there is a button there notification settings if you click that you can allow and disallow any notifications.
this also helped me get rid of the T9 notification that came up every time I wanted to type.
(the drop down is also good to know where your batterie is up to)
Hope it will help out anyone with this issues.