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The T-Mobile USA Xperia Z C6606 Bootloader is locked

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HoOnZ

Senior Member
Sep 13, 2005
220
27
Somerset
Well, I went to check out the T-Mobile branded Xperia Z C6606 at the Sony Style store and was disappointed to see that the bootloader is locked.

I was trying to get information online if it was locked or not but couldn'tget any confirmation. I know that it'sprobably locked by T-mobile, but I was hoping.



Sent from my C6602 using xda premium
 

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Apollo89

Senior Member
Mar 9, 2013
1,307
2,071
All phones have locked bootloaders when they come from the store. 'Bootloader unlock allowed' means if it is allowed to unlock it yourself or not, but doing so will void your warranty and wipe your DRM keys (which are needed for Mobile BRAVIA Engine 2, MusicID/Gracenote, etc.).

Sent from my Xperia Z using Tapatalk
 

LitoNi

Senior Member
May 5, 2012
1,337
805
Vancouver
There is a carrier here in Spain that sells unlockable Xperias. It's the fourth mayor carrier so is not a shady one.

sim locked and locked bootloader are two separate things. >.>

usually when some stores states "selling unlocked xperia/galaxy/iphone/ etc.." it means the phone is unlocked and it can be used anywhere else. When you purchase a phone from a store (Sony store) or carrier (At&T) it is locked to them. In other words, the phone cannot be used with another sim card like T-Mobile, since the phone is locked to At&t.
 
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DrKrFfXx

Senior Member
Mar 12, 2011
554
183
Madrid
sim locked and locked bootloader are two separate things. >.>

usually when some stores states "selling unlocked xperia/galaxy/iphone/ etc.." it means the phone is unlocked and it can be used anywhere else. When you purchase a phone from a store (Sony store) or carrier (At&T) it is locked to them. In other words, the phone cannot be used with another sim card like T-Mobile, since the phone is locked to At&t.

I totally understand what is sim and boot lock.

I've had in my hands a couple of Xperia devices from that company (Yoigo), one Xperia Mini Pro I think, and the other one a Xperia Z, and both had "Bootloader Unlockable: Yes" on the service menu.
 

PR0XIDIAN

Senior Member
Dec 20, 2011
55
3
Colorado Springs
I've seen some phones in the past that were sold by T-Mobile or other carriers but were not bootloader locked. With T-Mobile's new business model and the fact that Sony was selling it outright at their stores, you would think that it should be unlocked.

T-Mobile isn't really known for locking bootloaders. Verizon on the other hand... When it comes to locked boot loaders it seems to be like this.


Locked carriers:
Verizon
at&t

Mostly unlocked carriers:
Sprint
T-Mobile

Phone brands locked:
HTC
Sony Xperia
sometimes LG

Phone brands not locked
Huawei
Samsung

This has just been my experience.
 

dnaL0R

Senior Member
Oct 11, 2009
222
18
soCAL
i understand that the bootloader is locked for the t-mo version (c6606), but what about root?

i want to be able to run ti backup and get rid of all these ads...
 

E90 Commie

Senior Member
Feb 5, 2009
1,753
675
New York
I played with the TMO version today and find it inferior compared to my own C6602. The first problem is the branding and bloatware - yes it is bloated carrier style and a lot of TMO notifications where shown on the demo unit. One of the demo units had noticeable lag, much worse than my C6602 back in March on .350. The other one were smoother.

I managed to put System Tuner on one of them - it runs the standard Interactive governor and 384-1551 is the used frequencies.

The price tag was very high - $610, $579 with "appropriate plan". More expensive than in the Sony Store for an unbranded, unlocked and superior C6602.

I just don't see any reason to buy the TMO version when there is the C6602 available for less money (albeit at a small difference) that can be bootloader unlocked and optimized. Paying MORE for a carrier branded device? No way.

To those that feel that they need to talk LTE with me as a reason to buy the branded edition: wait for the Honami instead - it will offer a superior LTE radio, which means that it can be used on many carriers. I base this assumption on the nice multiband LTE radio that the Z Ultra offers.

After playing with the T-Mobile version, my recommendation of the C6602 instead is stronger than before.

To those that want to argue about prices: use a credit card instead if $539 is "too much".
 

E90 Commie

Senior Member
Feb 5, 2009
1,753
675
New York
t-mobile's wifi calling feature is the ONLY reason why i went with the C6606... having lte is nice too, i guess :p

I don't get the reason the have WiFi Calling when there is a little thing called Google Voice. I can make free calls to the whole US that way and even configure it as a 100% IP phone with GrooveIP. For international calls, I am using Viber or Voice (my relatives in Sweden use Viber so we have free calls).

To me, carrier bloat and locked bootloaders are total dealbreakers and I can't really see how WiFi Calling can compensate.

LTE? I will get it when I can buy a standard, unlocked device and use it. As long as I need carrier branding in order to use it - I say pass.
 

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    There is a carrier here in Spain that sells unlockable Xperias. It's the fourth mayor carrier so is not a shady one.

    sim locked and locked bootloader are two separate things. >.>

    usually when some stores states "selling unlocked xperia/galaxy/iphone/ etc.." it means the phone is unlocked and it can be used anywhere else. When you purchase a phone from a store (Sony store) or carrier (At&T) it is locked to them. In other words, the phone cannot be used with another sim card like T-Mobile, since the phone is locked to At&t.
    1
    Well, I went to check out the T-Mobile branded Xperia Z C6606 at the Sony Style store and was disappointed to see that the bootloader is locked.

    I was trying to get information online if it was locked or not but couldn'tget any confirmation. I know that it'sprobably locked by T-mobile, but I was hoping.



    Sent from my C6602 using xda premium
    1
    I've read that some custom ROMs can still be flashed on this phone without unlocking the bootloader. Is this true?

    Yes, if they are based on the stock kernel.
    1
    E90 Commie, thanks for the reply. You brought up some valid points and dammit, now I have to really think about what I am going to do since I was planning on leaving Sprint today to get on TMo. If you don't mind I have another question, by flashing one of the original Sony ROMs will it disable the LTE on the TMo edition? Not that LTE is a deal breaker but just curious about it.

    I have the t-mobile version and I flashed a c6603 stock Rom and I still get LTE I didn't flash the baseband I kept it the stock tmobile one

    Sent from my C6603 using Tapatalk 4 Beta
    1
    no luck...

    the phone auto reboots so quickly when i change the root permissions via file explorer apps that i cannot replace the necessary file...

    i returned the Z yesterday and i am currently on my backup phone [LG L9]... i have already tried out the htc one and gs4, so i will be waiting for the honami.

    You probably didn't install the remount-reboot fix after rooting. Without this fix, the RIC service reboots your phone when you remount your /system partition as R/W.

    This issue is also mentioned in DooMLoRD's Easy Rooting Toolkit post:

    If you are facing issue of device rebooting when remounting /system partition then checkout the fix posted by @[NUT]