Hello 👋 @Marcin_InS
You could try >
- Clear Cache Files from the phone's System Partition Section > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop or use a Tv's USB Port or a usb-c to usb-c phone to phone set up to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too { Possibly excluding the s²⁴ Series of phone's }
And a factory reset.
May I suggest to perform a forum search as you may find already existing threads with help and advice within in regards to Wi-Fi not turning On.
Unfortunately if a phone suffers from water ingress this can either have immediate effects, or soon to follow issues as the internals of the phone can oxidise and fail.
It can also depend on what the liquid was or contained.
To gain information on how much the repair would be then a Samsung Service Centre would need to assess the phone to see what parts need replacing.
Accidental damage isn't covered in the standard Samsung Manufacturer's warranty so expect a cost to pay unless you have Samsung Care+ , or you have alternative insurance such as Home Contents Insurance or some Bank Accounts provide cover as a perk of the account.
Once you have a costing you can then weigh up that up against the current value of the phone to continue or not.
https://www.samsung.com/uk/support/repair/
If i can be of any further help please don't hesitate to ask 😎
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
