Here at AndroidLegend.com, we have

Here at AndroidLegend.com, we have written this article at our level best. By any chance, if you brick your device after following this guide, the whole responsibility will be yours. Before attempting this procedure, go through each and every section of this article as most of the problems occur because of not reading them thoroughly. You’ve been warned. Be careful!

There is one more thing you should note – unlocking bootloader / flashing custom recovery, kernel or ROM will void your phone’s warranty (which can be retained by flashing an official firmware though). So, think before you proceed. You’re good to go now.

Xperia U Official Android 4.1.2 Jelly Bean Firmware

Compatibility

This port of Android 4.1.2 firmware is compiled and strictly intended for Sony Xperia U ST25i. Flashing it on any other Xperia / Android device will stop its working and may lead to boot loop. In certain cases, it can also hard brick your phone and may damage the internal hardware.

If you aren’t sure of your device’s model number, you can check the same here: Settings –> About Device (last option in the Settings menu)

Pre-requisites

Battery level below 50% is not recommended. You should charge it up to the certain level (say around 75%) so that device won’t turn off while flashing the ROM.

You may be interested in – Improving Battery Life of your Android Device.

This procedure involves internal storage data wiping. Therefore, we highly recommend you to make a backup of your important data such as Contacts, SMS / MMS, Apps, APNs, Call Logs etc. We’ve mentioned few guides below that will help you in backing up your personal data stored on the phone memory.

For Backing up Contacts & Messages, follow this guide:

How to Backup Android Contacts and Text Messages (SMS / MMS).

For Backing up Call logs & APNs use this guide:

How to Backup Call logs and APNs from your Android Device.

Device specific drivers must be installed in your PC. This is required to establish the connection between phone & PC while flashing the kernel. You can download drivers from the link given below:

Drivers for Xperia U

(Most Important!) In order to flash the Custom ROM, device bootloader must be unlocked. If you’ve not unlocked it already then follow this guide.

Custom Recovery like Clockworkmod is also required to flash a Custom ROM. If you’ve not installed it yet then use RecoverX tool mentioned in this guide for installing the same.

Note: Above two steps shouldn’t be skipped as they are very essential to flash Android 4.1.2 firmware. You can’t proceed further without completing them.

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Here at AndroidLegend.com, we have written this article at our level best. By any chance, if you brick your device after following this guide, the whole responsibility will be yours. Before attempting this procedure, go through each and every section of this article as most of the problems occur because of not reading them thoroughly. You've been warned. Be careful!There is one more thing you should note – unlocking bootloader/flashing custom recovery, kernel or ROM will void your phones warranty (which can be retained by flashing an official firmware though). So, think before you proceed. Your good to go now.Xperia you Official Android 4.1.2 Jelly Bean FirmwareCompatibilityThis port of Android 4.1.2 firmware is compiled and strictly intended for Sony Xperia you ST25i. Flashing it on any other Xperia/Android device will stop its working and may lead to boot loop. In certain cases, it can also hard brick your phone and may damage the internal hardware.If you aren't sure of your device's model number, you can check the same here: Settings –> About Device (last option in the Settings menu)Pre-requisites Battery level below 50% is not recommended. You should charge it up to the certain level (say around 75%) so that device won't turn off while flashing the ROM. You may be interested in – Improving Battery Life of your Android Device. This procedure involves internal storage data wiping. Therefore, we highly recommend you to make a backup of your important data such as Contacts, SMS/MMS, Apps, APNs, Call Logs etc. We have mentioned few guides below that will help you in backing up your personal data stored on the phone memory. For Backing up Contacts & Messages, follow this guide: How to Backup Android Contacts and Text Messages (SMS/MMS). For Backing up Call logs & APNs use this guide: How to Backup Call logs and APNs from your Android Device. Device specific drivers must be installed in your PC. This is required to establish the connection between phone & PC while flashing the kernel. You can download drivers from the link given below: Drivers for Xperia you (Most Important!) In order to flash the Custom ROM, device bootloader must be unlocked. If you've not unlocked it already then follow this guide. Custom Recovery like Clockworkmod is also required to flash a Custom ROM. If you've not installed it yet then use RecoverX tool mentioned in this guide for installing the same.Note: Above two steps shouldn't be skipped as they are very essential to flash Android 4.1.2 firmware. You can't proceed further without completing them.

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在androidlegend.com，我们写的这篇文章在我们的最佳水平。任何的机会，如果你砖设备后本指南，全部责任都是你的。在尝试过程中，经过每一段文章的大多数问题的发生是因为不读书彻底。你已经被警告过了。小心！

还有一点要注意–解锁Bootloader /闪烁的自定义恢复，内核或ROM将使您的手机的保修（这可以通过闪烁的官方的固件虽然保留）。所以，在你进行思考。你去好了。

Xperia U的官方Android 4.1.2果冻豆固件兼容性



这个港口的Android 4.1。2固件程序的编写和严格为索尼XPERIA U st25i。它闪烁在任何其他的Xperia / Android设备将停止工作，可能导致启动回路。在某些情况下，它也可以硬砖您的手机，可能会损坏内部硬件

。如果你不确定你的设备的型号，你可以检查一样：设置>关于设备（–最后一个选项在设置菜单）

前提

电池电量低于50%不推荐。你应该给它充电到一定程度（大约75%）使装置不会关闭而闪烁的罗

你可以提高你的Android设备电池–

生活感兴趣。本程序涉及到内部存储数据擦除。因此，我们强烈建议您备份重要数据如联系人，短信/彩信，APN，通话记录等应用程序，我们已经提到过一些引导下，会帮助你备份你的个人数据存储在手机内存。

备份联系人&消息，遵循本指南：

如何备份手机联系人和短信（短信/彩信）

。备份通话记录&APN使用本指南：

如何从你的Android设备备份的通话记录和APNs。

特定设备的驱动程序必须安装在你的电脑。这就需要建立电话&PC之间的连接而闪烁的内核。你可以从下面的链接下载驱动：

司机的Xperia U

（最重要！）以Flash ROM，Bootloader必须解锁装置。如果你不打开它已经按照本指南。

自定义恢复如ClockworkMod也需要闪光灯自定义ROM。如果你没有安装它然后使用recoverx工具在本指南中提到的安装相同。

注：以上两个步骤不可跳过，因为他们是Flash Android 4.1.2固件很重要。你不能继续进行没有完成的。