S4国行移动版i9508安装Android 7.1.1记录

本文主要记录了如何在一台老国行S4 GT-i9508上安装新android发行版本。

android系统软硬件相关

android系统与刷机相关的部分是3块，

• boot loader:硬件提供商提供的硬件启动模块，类似pc的BIOS
• recovery:在引导android系统前提供额外的功能如恢复出厂设置，安装系统升级等
• android 7.x.x:正常用户

准备工作

我们需要做的：
1. 将三星原生的Recovery 升级到第三方TWRP
2. 下载一个android 7.1.1 发行版
3. root 当前的手机系统
4. 将所有的文件放入external sdcard , backup all of your files (personal data).

升级Recovery

升级可用两个方法

• 使用Odin在PDA(AP)选项下载twrp-3.x-0-jfltexx.img.tar ，Odin其他项不需要改变；作者的S4在通过odin3安装多次依然还是没有成功，表现为一直进原来的recovery的朴素的界面，始终没有进入第三方recovery，遂有了下面的方法。
• 使用TWRP的官方APP 在手机端选择合适的img文件通过root安装。

关机后 ,Power +VolUp+Home 保持，出现几行小字后释放所有按钮,进入recovery，应该是这个样子

升级android系统

这里使用的是Optimized-LineageOS-14.1-20170213-Snapshot-beta5-jflte-AROMA版本，以及安装了google application，
here we just need to fellow xda forum’s guidence under TWRP environment.

FULL WIPE (with external microsd card)
= Move any files you want to keep to your External MicroSD Card - OR YOU WILL LOSE THEM.
= DOWNLOAD your Optimized LineageOS Rom and GApps Package
= Move your Optimized LineageOS Rom and GApps Package to the external microsd storage
= Boot into Recovery Mode (HOLD Volume UP, Home, and Power button for 1 second after the vibrate)
= Wipe > Advanced Wipe
= Select ON (enable tick) for Dalvik / Art Cache, System, Data, Internal Storage, Cache.
= SWIPE to Wipe at bottom of screen
= Back to MAIN START SCREEN
= Wipe > Format Data
= Type ‘YES’ and press blue checkmark at the bottom-right corner
= Back to MAIN START SCREEN
= INSTALL to install Rom and GApps
= AFTER you have finished installing the Rom and GApps > WIPE CACHE/DALVIK > SWIPE to Wipe
= REBOOT SYSTEM

.

Done

After reboot ,Enjoy this new mobile phone~
If it occurs problems, the more you Google,the more you’ll learn from Internet.