I really like my S7 Edge. However as a direct result of installing the Oreo update I have significant battery drain. The drain is attributable to cell standby which sometimes reaches over 50% of battery use. It definitely did not do this on Nougat, ever.
I have not added any apps to cause this problem and would really like a suggestion about what to do. I can't believe Safe Mode will have any effect as this has happened as a result of the upgrade, not rogue apps. I am not keen to do a factory reset either as I can't see the benefit. I have cleared the cache, removed some apps, restarted etc, turned off any battery hungry options in settings but to no avail.
If anybody could help me I would be very grateful. I believe it is a bug in Oreo or Samsung's altered version of Oreo but cannot prove either. I can't think what to do apart from find out how to downgrade back to Nougat, which I don't want to do.
I have the G930F Galaxy S7 flat.
which modem can i flash to stop the battery draining ? And were can i download it?
What steps should I take to get back to Android nougat without losing my settings on my phone?
There is no steps, I quess, to save your personal data through downgrade process. I believe, your data "converted" from Nougat to Oreo so that it will be compatible for new OS.
And actually, it is better to wipe data along with downgrading, because you will bypass a lot of issues.
EDIT: Backup your data with Kies and using other options (Samsung Cloud, Google Drive), downgrage to Nougat and restore the backup then. By these steps you will save a lot of time.
Were can i download that new Modem???
if only flash modem ereo, will i receive updates ota?
No, you will NOT receive OTA after flashing different part of ROM than was included in official version of ROM. You will have to flash back the original modem in order to receive OTA.