Xperia XZ3 doesn't work on any carriers in USA

I have a sony Xperia XZ3 (H9436) . Went through hell and back trying to unlock the bootloader and install IodeOS 3.4 . Never did it before, had to research for 12hours a day for about 4 days straight and figured it all out and it worked . then I connected to wifi and updated to IodeOS 4.0. that worked and my device currently has 4.0 installed working great! very happy :slight_smile:

yesterday went to phone store near Chicago. They sold me a “lycamobile” plan and sim card (nano sim). Mobile data, calling and texting was working fine. I was super happy! I thought I was all done and that I had a phone with Iode that works making calls and texts and mobile data works. Wrong.

Later in the evening the entire service shut off. No calls texts or mobile data. Then I noticed a notification on the notification bar now saying


Slot 0
Modem Configuration: S264.6
Firmware file: mcfg_sw/generic/row/tmobile/vl/us/mcfg_sw.mbn

I assume T-mobile is trying to push a firmware file to install on my device like they do with their prostitute androids with their omnipotent control/force update. Anyway, here is the most important part of this “problem” (“problem” defined as: trying to get an Xperia Xz3 with IodeOS 4.0, 3.4, TO WORK IN UNITED STATES TO MAKE CALLS TEXTS AND HAVE MOBILE DATA)

When you check the IMEI # of this phone (IMEI carrier compatibility checkers) it is a dual SIM and there are two IMEIS, they show up as the wrong device " SONY Xperia Z3 D6603"! which is the incorrect model! That model only uses 3g and is discontinued in USA because the last 3g tower in USA just got taken down last month. I called AT&T and told them to check my IMEI and they said that it comes back as “unknown”
of course it does. because their server has the wrong IMEI for my XZ3. their server reports a “SONY Xperia Z3 D6603” which doesn’t use LTE 4g network, only 3g. SO of course they removed the phone and don’t support it. but the problem is that my IMEI is tied to " SONY Xperia Z3 D6603" for them. So At&t isn’t an option for this device! fuck

Does anyone have an XZ3 with IodeOS working in USA making calls and texts and using mobile data? And what the hell does that notification mean?

Slot 0
Modem Configuration: S264.6
Firmware file: mcfg_sw/generic/row/tmobile/vl/us/mcfg_sw.mbn

Hi, changing IMEIs could be changed as a criminal offense. Don’t do that! You can fix or repair the IMEI on your device using DB files from Stock ROM.

I would start from scratch, so conditionally with the installation of the latest Sony Stock Android 52.1.A.3.137-RZC (United Kingdom). Download the XperiFirm software. This will help you in downloading the last firmware file. How to Install Stock Firmware on Sony Xperia using Xperifirm and Flashtool.

As sidenote: The Sony Xperia XZ3 (H9436) supports all major 4G LTE frequencies in the US.

Sony Xperia XZ3 (H9436) 4G LTE bands

LTE (FDD): Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 19(800 Upper), 20(800 DD), 26(850+), 28(700 APT), 29(700 d), 32(1500 L-band), 66(AWS-3)

LTE (TDD): Bands 38(2600), 39(1900+), 40(2300), 41(2600+)

Cheat sheet: which 4G LTE bands do AT&T, Verizon, T-Mobile and Sprint use in the USA?

Just because the Sony Xperia XZ3 hasn’t been tested by AT&T and is on their approved device list doesn’t automatically mean AT&T LTE won’t work.

According to gishan net, the Sony Xperia XZ3 is compatible with AT&T HSDPA and AT&T LTE. To configure AT&T APN settings with Sony Xperia XZ3 follow this steps:

I put in an AT&T sim card, then reset the network and APN settings

then put in my other SIM for a different carrier, deleted the APN settings and then restarted the phone, and it automatically put its own correct APN setting and its working great so far. Hahah after all this BS the last 7 days I finally beat the system and I win.

Victory. For now.

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iodecoq Hi @naroha, welcome to the free world. Welcome to the iodé community - Made in France.