I think you live in Serbia based on your profile. I have a friend living in Serbia and he owns as far as I know last year’s Sony flagship Xperia 1 VII
Yeah I live and work in Serbia(I’m from Sweden) OK yeah I guess you could buy one of Amazon but import cost would be high!
So I went with Samsung like my Wife.
For the first question, if you want wired ones look for sennheiser headphones. A bit pricey but a very good and will outlast your phone by years. If you are looking for ear buds then go for JBL earphones and earbuds. Totally worth it.
For second one, yeah the phone is good.
For the third one, yes it will be, but not insurmountably difficult. Shifting from Apple Pay and other apple eco system services will be different. For most of them there is a one-to-one replacement. For others there is none. The ability to play seamlessly across various iOS, iPADOS, OS-X will not be there. One thing that you will miss is the very strong privacy and security focus of Apple ecosystems. It is not perfect, It is not foolproof but it is still one of the best out there. For example in all of Samsung phones there is a way to switch off completely at the system level microphone, camera, bluetooth scanning, WifiScanning, NFC, etc. Such that these are not accessible by any application. That is not possible for Apple. But apple does prevent to a degree cross application tracking which Samsung does not. Samsung has a screen privacy feature which prevents others from peeking at your screen. That is missing from Apple.
Samsung provides about 4-5 years of product updates and security fixes. Android and consequently Samsung are data hogs, so be prepared for massive data harvesting from service providers like google, meta, etc. Apple also harvests data but not to such an extent. The Camera is better in S26 Ultra. For the phone that you have selected, Samsung S26 ultra, the battery life and screen will be better. Shifting of services will require access to cloud services like Google drive or dropbox or others. Transfer of contacts is also difficult though not as much.
You should know that both, Samsung and Google, install software on your new phone. Many users consider this “bloatware” and some of these apps can not be removed or deactivated.
Many users only consider google as the “evil data octopus”, but samsung is playing that game too. This article here is not going into much details, but it is alarming from my point of view.
With your new phone you do not only have to deal with all the google stuff but also with the Samsung stuff.
If I were you, my main priority would be to achieve a decent data privacy setup. I guess there is a lot to read.
Thanks everyone for the advice!
Regaring this messages - I just got back from store and picked up my new phone the first thing I will do after initial setup is do the ultimate debloating of my phone 
One of the most successful applications is netguard for Android; it can lockdown the entire traffic and then selectively allow only the browser or mail app. Another feature is a host-like IP and address table that blocks ads and the like. (You import a host file and netguard constantly checks traffic against that.)
In addition, many Android/Google apps cannot be de-installed, but de-activated, say Playstore. That often suffices for other programs to stop working.
There is an advertisement ID, it’s autocreated, you need to delete that in the settings.
Those were good phones. Is Sony still producing them?
Please do share what did you do to de-bloat your Android phone. Did you follow some tutorial? What steps did you carry out? etc.
I didn’t do anything for now but a good friend of mine will help to debloat and make my phone more private because he’s a real Android expert.
After all procedures I can share what have we done to debloat my Samsung
Debloating the stock ROM is typically a waste of time, there’s still tons of baked in telemetry.
If you use GrapheneOS, be prepared to sacrifice the Google stuff.
I personally use LineageOS on some of my devices and I would recommend it if you’re not willing to go to that (GOS) extreme.
Good luck with getting off of Crapple though!
I would’ve switched on custom ROM if Odin wasn’t softlocked in OneUI 8
You’re lucky you’re talking to a guy who has some experience with the tool (ODIN).
Unlocking ranges from “trivial” to “literally impossible”, depending on the device.
Devices here are typically either “trivial” or “requires exploits”. Otherwise, it’s likely your device is in “literally impossible”.
You can always look up stuff like “SM-XYZ123 bl unlock”. For example, the Verizon Galaxy Note 3 would be “SM-N900V bl unlock”. (yes I know the phone’s old, it’s an example k?)
Usually you’ll get an XDA Forums result.
For newer devices (ex: SM-P610), the underlying bootloader protections are rather annoying (look up “KG State: Prenormal” and you’ll get what I mean), but it’s not “literally impossible” more than it is “trivial (but annoying)”.
Hopefully this wasn’t all just known to you beforehand somehow, making this post basically useless.
Again, good luck.
I did some research after I read your reply and I found out on XDA that for now S26 Series are in “literally impossible”
Please make notes, share with us.
You can use Universal Android Debloater Next Generation, it’s a friendly graphical tool.
The AUR package is uad-ng-bin.
Thanks for the advice!
As of right now and my pal are looking into using this app but we’re still searching for good scripts and apps because his techniques doesn’t really help in my situation
A little update for those who asked:
After some time me and my friend decided to go with UAD-NG which was recommended by @vazicebon (thank you).
We went and made a custom medium-debloat list (web attachment below) to make the system clean but keep testing utilities/semi-hardware-related software and some of system programs on-board that affects privacy the least.
The only thing left is to do GUI privacy configuration
UPD: What we left on my phone (From recommended section of UAD-NG)
Try this while you’re at it.
Looking nice but unfortunately until some genius on XDA hack OneUI or Samsung engineers decide to bring back bootloader unlock I can’t try it 
