[Xperia Z2 Q&A, Help & Troubleshooting] Cluey:
[MENTION=7045365]berbatov93[/MENTION] I'm sure Sony will fix it if you pay them too!

Hopefully it won't come to that though, they're pretty hard to brick because of the way they've set things up. Even if you soft brick it you can power it off, fire up the flash tool and then hold volume down and plug USB in, press flash and it'll put a base Sony ROM on for you. I've kept the D6503_17.1.A.2.55_Generic AU 1281-9715.ftf file on my PC for just that reason but I haven't had to reuse it yet. :D

I don't know of any other instructions for making your own pre-rooted zip file, it took me a fair bit of reading and looking at menu options to work it out the first time but it's pretty easy. You won't screw your phone up with it as it will fail before you get it to the phone if you do it incorrectly. As with most things in life you have to learn from experience, just follow the instructions with the programs open so you can refer back to them. You could try Google for better instructions, I'm not sure if anyone wrote something more newbie friendly.

As for the WiFi problem perhaps a different ROM version will sort it out, also you might want to get all your data off your phone and do a completely fresh install on it and see if that sorts it out. The backups people talk about as Nandroids are done from in the custom recovery, have a look in there now you've got it working again. I'm not going to reply to the other thread as I see you did it all again.

I doubt there are any pre-rooted 4.4.4 still around as most people have moved on. There's probably no need to make a pre-rooted one though, one of the root exploits works on it so you could just download, via XperiFirm, the 4.4.4 you want and flash it, then root it. I've never downloaded a pre-rooted ROM as I'm overly cautious, I'm not even keen on using the one click root programs as I can't read what they're doing!

You could call it a Chrome problem but I'd really call it a user problem. Like I said originally you could try another browser and see if it copes better but they aren't really designed to have lots of tabs open. Each tab takes up memory, so you'll fill it all up and then it will start using virtual memory but eventually it will crash. It happens on desktop computers too, I've got 8GB of RAM in my PC but Chrome eats it all up if I open too many tabs.

I don't know what to do about your mic problems in call, I'd take it back to where you got it from and see what they say. But I'm pretty sure you've waited too long as you indicated it was out of warranty which is why you've started looking at root options now. If you've been having problems for a while you should have taken it back before you lost that. It's still worth asking the store/phone company about it though, just make sure they don't go charging you anything to fix it without asking you about it.

You might just have to chalk it up to experience and live with it. Never be afraid to ask for things to be looked at while the warranty is valid, it might be inconvenient but if something needs fixing it's better to use the warranty than pay for it. ;)

The other option would be to use a headset for calls, I picked up an SBH52 and I'm pretty happy with it. As long as you don't lose or break it it will work with whatever phone you end up replacing your Z2 with.