I did not do hard reset on my L1520 yet and I don't think I will. It all works rather nicely, text notifications are working now, for video I use VLC. I noticed a few small things this morning.
1. There's an intermittent problem with displaying mobile data speed. Sometimes it shows none even if I can browse with Edge no problem.
2. One thing about Edge and ads. Ads stop rendering of a page, until these are loaded, one can do nothing. They should be loaded (if at all) in parallel and not block the browser.
3. We are one step further with setting the mobile data limit. Now the type and amount sticks (but you have to leave amount control first for the value to be overtaken). But the beginning of a monthly limit (day) is ignored and the current day is used instead.