General Caution Xperia 1 IV USA version XQ-CT62 bootloader unlock not allowed!

[2015Ducatimulti]

I received my IV on Wed, and love the phone, I did use the IV global version and I was able to unlock the bootloader and root, mostly I did that so I could use Repainter App to change the UI colors, and fonts, and I checked the service menu on mine and says the bootloader isn`t allowed to be unlocked, i still got the code from Sony website and tried it and said it Failed and isn`t allowed, so I`m talking to Sony chat right now, to figure out if this will ever be allowed, see below is what sony told me, I hate to retun it, but I think I`ll return and wait and see if it ever becomes allowed.


Based on the details that function is not available due to security reasons and at the moment we don't have any news about an update that may enable that option

 

[Timafon4ik]

Good afternoon, can I have a detailed instruction on root and twrp?

 

[FreshlyBaked 420]

Well this is sad news, I was looking at getting the new NA 1iv, but I'm not buying a device when I cannot unlock the bootloader. Sony support confirmed it cannot be unlocked. And support could not explain why the Global version can, and not the NA version.

 

[billycar11]

wow really i had this preordered since may im not buying it if i cant unlock the bootloader wth

well i cant cancel it maybe support can when they are open it is supposed to be here on the 22nd but i didn't get a tracking number yet

 

[2015Ducatimulti]

wow really i had this preordered since may im not buying it if i cant unlock the bootloader wth

well i cant cancel it maybe support can when they are open it is supposed to be here on the 22nd but i didn't get a tracking number yet

yeah when I went into the service menu by dialing *#*#7378423#*#* the "Bootloader unlock allowed", and mine said "NO", and still tried to unlock the bootloader and said failed and wan`t allowed, so I sent it back to the seller I bought it from, but was hoping maybe the one direct from Sony will be allowed, so I couldn`t help myself and order the purple one from Sony and still says delivery for 22-23 so will see.

 

[YandereSan]

RIP. As if the price and overheating issues weren't enough.

 

[2015Ducatimulti]

RIP. As if the price and overheating issues weren't enough.

I know, then sony just dropped a bomb overnight on pre-ordered people, about delivery dates, now some orders have been pushed out to Oct. 21st. I had purple on pre-ordered, since I didn`t like the black color, so I was one of those people my order was pushed back to end of Oct., so I cancelled my order.

 

[joeminati]

Oh, man. They might have a cross flash block then if they even bothered with this bootloader lock.

I tried cross flashing the IV XQ-72 to South East Asia and it worked (from China).
I tried to flash US firmware and got the corruption error.

It appears the firmware released on Xperifirm shows an older version firmware and maybe the reason for the error - no rollback flashing.

 

[Hurt Copain]

I received my IV on Wed, and love the phone, I did use the IV global version and I was able to unlock the bootloader and root, mostly I did that so I could use Repainter App to change the UI colors, and fonts, and I checked the service menu on mine and says the bootloader isn`t allowed to be unlocked, i still got the code from Sony website and tried it and said it Failed and isn`t allowed, so I`m talking to Sony chat right now, to figure out if this will ever be allowed, see below is what sony told me, I hate to retun it, but I think I`ll return and wait and see if it ever becomes allowed.


Based on the details that function is not available due to security reasons and at the moment we don't have any news about an update that may enable that option

Hey I have a North American variant, XQ-CT62/B and same situation I can't unlock, says not allowed. I build roms. I can't with this. Amazing phone though. Returning and buying the European or Asian variant for bootloader unlock. Only missing a lesser used by my carrier (T-Mobile) band on both..the big bands 71,77 are there.. XQ-CT72 is Asia and XQ-CT54 European.. found on Amazon for around 8-900$ only 256 but who cares....

 

[Hurt Copain]

Oh, man. They might have a cross flash block then if they even bothered with this bootloader lock.

I tried cross flashing the IV XQ-72 to South East Asia and it worked (from China).
I tried to flash US firmware and got the corruption error.

It appears the firmware released on Xperifirm shows an older version firmware and maybe the reason for the error - no rollback flashing.

I can't get anything to flash with my bootloader locked with this tool. I downloaded and auto unpacked the firmware but can't flash.. was gonna flash Asian latest on it to see if it would trick the bootloader version to allow unlock. If there is a way to flash locked, please let me know. I will build the coolest roms for us guys..I do Derpfest, Ancient OS, and Project Zephyrus for Pixel 6 series, officially.. nonetheless in a week or 2 I will begin...

 

[2015Ducatimulti]

Hey I have a North American variant, XQ-CT62/B and same situation I can't unlock, says not allowed. I build roms. I can't with this. Amazing phone though. Returning and buying the European or Asian variant for bootloader unlock. Only missing a lesser used by my carrier (T-Mobile) band on both..the big bands 71,77 are there.. XQ-CT72 is Asia and XQ-CT54 European.. found on Amazon for around 8-900$ only 256 but who cares....

yeah I bought the CT72 first and loved it, so I figured since the Asia model allowed bootloader unlock, so I figured the USA version would, just really sucks the USA version doesn`t. I hate the flat dull stock colors for the UI, so I like to root and use RePainter app and change the colors and use root to change fonts and etc. so much for Sony being developer friendly in the USA, but yeah in my area on Googfi that uses T-mobile towers, 5g here uses the N71 band and when I had the CT62 I was on the N71 band and was able to have 234 mb down load speed which was faster than my pixel 6 Pro, but right now I hope for future update that would allow it, for 1600.00 that's no go for me, GoogleFI had deal going on for existing customers, if I bought S22 Ultra I would get 400.00 off, so I ordered a S22 Ultra green 256gb, so I will have that coming Tuesday, and I still have my 6 Pro I`m using at the moment That I`m using and its rooted, then I actually have another Xperia 1 IV Purple coming Thursday 29th, I had ordered it and forgot to cancel the order and shipped, so I figured I do comparison of the Camera`s with the 6P,S22U and the IV and other features, I have had the S22U before and Samsung allows lot of customization with out root, but the size of the IV is the prefect fit. Time will tell.

 

[Hurt Copain]

yeah I bought the CT72 first and loved it, so I figured since the Asia model allowed bootloader unlock, so I figured the USA version would, just really sucks the USA version doesn`t. I hate the flat dull stock colors for the UI, so I like to root and use RePainter app and change the colors and use root to change fonts and etc. so much for Sony being developer friendly in the USA, but yeah in my area on Googfi that uses T-mobile towers, 5g here uses the N71 band and when I had the CT62 I was on the N71 band and was able to have 234 mb down load speed which was faster than my pixel 6 Pro, but right now I hope for future update that would allow it, for 1600.00 that's no go for me, GoogleFI had deal going on for existing customers, if I bought S22 Ultra I would get 400.00 off, so I ordered a S22 Ultra green 256gb, so I will have that coming Tuesday, and I still have my 6 Pro I`m using at the moment That I`m using and its rooted, then I actually have another Xperia 1 IV Purple coming Thursday 29th, I had ordered it and forgot to cancel the order and shipped, so I figured I do comparison of the Camera`s with the 6P,S22U and the IV and other features, I have had the S22U before and Samsung allows lot of customization with out root, but the size of the IV is the prefect fit. Time will tell.

So ct72, has decent speeds? I have TMobile..also can you tell me where you bought it? I found ng or ngp mobile store on amazon that has them for like 870-900$

 

[2015Ducatimulti]

So ct72, has decent speeds? I have TMobile..also can you tell me where you bought it? I found ng or ngp mobile store on amazon that has them for like 870-900$

the CT72 network speed was sort of ok, but I was kind of disappointed with the speeds, best I got was 20mb that was it, that`s why return it, for the USA version, but I bought the CT72 from seller on ebay NEVRMSRP, it was the purple color and was 512gb storage, brand new in the sealed box for 1069.00, but I think they don`t have any new ones for sale.

 

[Hurt Copain]

the CT72 network speed was sort of ok, but I was kind of disappointed with the speeds, best I got was 20mb that was it, that`s why return it, for the USA version, but I bought the CT72 from seller on ebay NEVRMSRP, it was the purple color and was 512gb storage, brand new in the sealed box for 1069.00, but I think they don`t have any new ones for sale.

Oh no that's no good. I'm in ohio and typically have 5G UC on my Raven and rn on the us variant I'm pulling similar speeds. I checked bands on that international and it was only missing a lesser used one, band 41. Unless I'm mistaken..thanks for the insight though!

 

[2015Ducatimulti]

Oh no that's no good. I'm in ohio and typically have 5G UC on my Raven and rn on the us variant I'm pulling similar speeds. I checked bands on that international and it was only missing a lesser used one, band 41. Unless I'm mistaken..thanks for the insight though!

this is from gsmarena, I`m not sure how accurate it is

5G bands	1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA/Sub6 - Europe
	1, 2, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 71, 77, 78, 260, 261 SA/NSA/Sub6/mmWave - USA
	1, 3, 5, 7, 8, 28, 38, 40, 41, 77, 78, 79 SA/NSA/Sub6 - Asia

 

[Hurt Copain]

this is from gsmarena, I`m not sure how accurate it is

5G bands	1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA/Sub6 - Europe
	1, 2, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 71, 77, 78, 260, 261 SA/NSA/Sub6/mmWave - USA
	1, 3, 5, 7, 8, 28, 38, 40, 41, 77, 78, 79 SA/NSA/Sub6 - Asia

Nice, thanks this is the ebay store? And can you confirm it had Google play and setup wizard and stuff? Like US?

Sony XPERIA 1 IV XQ-CT72 256GB 12GB RAM Dual SIM (FACTORY UNLOCKED) 6.5" | eBay

Find many great new & used options and get the best deals for Sony XPERIA 1 IV XQ-CT72 256GB 12GB RAM Dual SIM (FACTORY UNLOCKED) 6.5" at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[2015Ducatimulti]

Nice, thanks this is the ebay store? And can you confirm it had Google play and setup wizard and stuff? Like US?

Sony XPERIA 1 IV XQ-CT72 256GB 12GB RAM Dual SIM (FACTORY UNLOCKED) 6.5" | eBay

Find many great new & used options and get the best deals for Sony XPERIA 1 IV XQ-CT72 256GB 12GB RAM Dual SIM (FACTORY UNLOCKED) 6.5" at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Yes that's seller I bought mine from, and yes it had Google play and everything like the US version

 

[Hurt Copain]

Yes that's seller I bought mine from, and yes it had Google play and everything like the US version

Thanks for your help man! Appreciate it!

 

[2015Ducatimulti]

Thanks for your help man! Appreciate it!

No problem!

 

[joeminati]

Hey I have a North American variant, XQ-CT62/B and same situation I can't unlock, says not allowed. I build roms. I can't with this. Amazing phone though. Returning and buying the European or Asian variant for bootloader unlock. Only missing a lesser used by my carrier (T-Mobile) band on both..the big bands 71,77 are there.. XQ-CT72 is Asia and XQ-CT54 European.. found on Amazon for around 8-900$ only 256 but who cares....

Hey Hurt,

Usually with the Xperia phones, or at least with the 1 series, you do not need to unlock the bootloader to flash. It is just a matter of using a flashing tool, run a executable, and it does it's thing. Only thing for unlocking the bootloader is to root.

I spent time flashing roms for phones of all kinds, and yes, unlocking the bootloader was always part of the process. And cross flashing region, even hardware different phones is allowed (which is weird because it's a no no for other company phone models, which can lead to bricking). I flashed my Xperia 1 II from US to SEA firmware. And also crossflashed my CT72 HK to SEA with no issues.

So try to cross flash the firmware to an Asian firmware if you can or still willing.

XDA for Xperia 1 III guides helped me flash.