Btw, I'm having the S9+. This might be the worst flagship phone ever. My bae's Huawei Nova 3i costing around 14k php has way better battery life that this 50k+ php flagship plus version. This is so frustrating.
Judging by the fact that all of the new Samsung phones came out with much bigger batteries, it would appear as if this issue is simply caused by Samsung refusing to make their software at all efficient.
Is it really more cost efficient to slap larger batteries in the phones than it is to make your software work more efficiently?
I mean how is it that many cheaper android phones even with heavy skins (like Samsung has) have far and away better battery life? Huawei, oneplus, xiaomi, Motorola, just to name a few. I don't believe anyone would argue these companies are in any way more superior than samsung is.
Maybe they just care more.
It is a bug in the modem, for some reason if you let the wifi on , with the data on, the batery drain , just disable the wifi when leave your house and you will see a big difference in the batery endurance.
Samsung doing this kind of bug to make to you to change to a new models like a S10.
This will be my last samsung , im wasnt to believe this, but is thruth they never doing the updates well, because if the device work well no nobody prooceed to buy a new model.
If it is truly a bug, which I don't believe it is, why would Samsung not immediately push out a patch? Bug fix? Address the issue before it gets worse and maybe the media or an influencer pick it up?
As I wrote above,it is just Samsungs heavy skin using a lot of power after the Android pie update. This is why they put much bigger batteries in their new flagships. I'm sure as Samsung improves the software going forward, and keeps putting bigger batteries in, the battery life will get better.
But for all of us that are stuck with a 3500mah battery in our 2018 'flagship' phones we are SOL.
So it just proves how much Samsung gives a dang about their customers.
I was on Android 9.0 Samsung one UI Beta 4. I had really great battery usage. I recovered a small 238 mb update for the official release and now It's using 15 to 20% when in stanby and idle. I found a temp workaround that gave me great battery usage for a few days. It's a bug no doubt.
I would recommend taking this up with your service provider. You could have a faulty sim card or your phone settings could have accidentally been changed.
Once again this may not necessarily be a phone issue. This post is regarding battery drain issues so I recommend making a post regarding your service issue seperately. But please check with your service provider first and keep us updated as to what the issue was.
Best of luck.