I remember my Huawei Tablet from years back. I had the same problem, even after applying all of those 3 measures. Huawei was know to be brutal under the hood to preserve battery.
With your rugged outdoor (!) phone I assume they have the same motivation. Maybe there is some specific advice from the manufactorer?
With your rugged outdoor (!) phone I assume they have the same motivation. Maybe there is some specific advice from the manufactorer?
