Xperia Z3 D6633 Not detecting 5Ghz Wifi

Hi..
Bought a new Z3 dual, it was connecting fine to my 5 ghz wifi.
Suddenly, phone is no longer seeing any 5ghz wifi and can only see and connect to 2.4 ghz.

Have contacted Sony support and they advised to do system repair which I did successfully.
After repair, phone detected 5ghz wifi, but just before I connect, it again dissappeared and now phone only sees 2.4

My other phones are normally connected to 5ghz, so seems not to be router problem.

I have also tried to change wifi channel, band and even security but no change.

Appreciate if anyone can help Pls.

My Sim card connects to LTE
Carrier Ooredoo Qatar

Thnxxx

Sent from my D6633 using XDA Free mobile app

D6633 TWRP cannot decrypt/mount encrypted volume

hello there,

Z3 D6633 here running 5.0.2 (HK) with TWRP rooted with superSU. Trying to upgrade to the newly released 5.1.1.

The phone had been be Encrypted some months ago and everything is fine. However, when I booted into TWRP to try to patch in 5.1.1, TWRP popped up with a password prompt. I entered the decrypt password (and other passwords I can think of) but TWRP replied with:

Unable to mount storage, and
Failed to decrypt data.

Google tells me there had been some issues with TWRP 2.8.4.1 to 2.8.6.0 unable to decrypt encrypted volumes so I went and grabbed the latest XZdualrecovery 2.8.21 and ran that in. All seemed fine and TWRP was updated to 2.8.7.0. Unfortunately, upon booting into recovery, TWRP still count not decrypt the volumes no matter what passwords I enter.

Does anyone have any ideas to get around this, short of a factory reset..? The SD card is also encrypted so I am trying to avoid factory reset if possible.. :(

Thanks in advance

Xperia Dual D6633 WiFi unstable / crashing

Hi,

I have a D6633, a couple of months back Sony released the Lollipop however after upgrading the WiFi keeps on disconnecting randomly; I went to the Sony Service Center however they said there is no problem; I did a repair many times using the PC Companion; however the WiFi just keeps on connecting / disconnecting.

Does anyone have the same problems?

D6633 IMEI:null but after 1 min IMEI appears and No Service !!

hey guys,,
i got that D6633 with IMEI problem ,,
when i restart the phone and request IMEI info via *#06# then IMEI:null ,,
but after 1 min when i repeat the request IMEI appears !! ,,
the problem is i can't call or receive cuz it's always "No Service" ,,
i've tried to flash the phone with Flashtool and SeTool Box with different FWs but same problem ,,
also tried to backup and restore TA but didn't help at all ,,
so, is there a solution for this weird problem ??

Also, check this video for another person suffering from the exact same problem ..
https://www.youtube.com/watch?v=vFsAC9UR_eo#t=31

Thx in advance.