How To Downgrade from Lollipop to Kitkat Version 4.4.2

https://androidforums.com/threads/guide-how-to-downgrade-from-lollipop-to-kitkat-version-4-4-2.919696/

I had a problem where my Samsung Galaxy S4 (SGH-I337M) was stuck in a boot loop because of the Lollipop 5.0.1 update. I tried everything from going into recovery mode and factory resetting it to doing the smack method on it. Then I found this way by flashing the Android Kitkat 4.4.2 ROM back into my phone via Odin. Here are the steps to downgrade to KitKat 4.4.2:

NOTE: I am not responsible for anything that happens to your phone. please proceed if you know what you are doing.

Before you start:

• Turn on USB debugging by going to Settings>More>Developer Options. (If you don't have developer options, go to Settings>More>About device and press the build number 5-10 times and developer mode will be enabled)
• Make sure battery is charged at least 50%
• Backup everything if you can or make sure you have a backup already done.
• Have your phone plugged into the computer

After you done those things, you ready to begin. Here is what to do:

1. Download Odin v3.09. You can download it by clicking the link. http://odindownload.com/

2. Download the firmware for your phone. Go to sammobile.com (You will have to create a free account first) and look up your model. (For Example: you will search SGH-I337M if you have a Canadian Galaxy S4). The Model info should be behind the battery. If you don’t know or can’t find it, comment below and I will find it for you. Make sure you have the right carrier as well if it says so.

NOTE: Downloading the firmware may take a while if you have a slow internet connection. If you have a slow internet connection, make sure your computer doesn't sleep overnight while its downloading. 

3. Extract both files to your computer.

4. Open Odin v3.09

5. On your Galaxy S4, Turn off your device. When its shut off, press the Power>Hone, and VOLUME DOWN key at the same time. You will see this pop up:
You will press volume up. Then you will see this.

 both photos via Google images

DO NOT TOUCH YOUR PHONE WHEN THIS SHOWS UP!

5. Open Odin v3.09. Click the AP Button.

 via www.androidlegend.com

6. Look for the firmware you downloaded and click open. You will have to wait a bit until the firmware is in Odin. You will know when its finished when you see the file name in the AP box.

7. Click START. You will have to wait as the process takes 5-10 minutes. The phone will reboot once or twice. then the welcome screen should pop up. and you are DONE. You have successful downloaded Android KitKat 4.4.2.

详解如何识破翻Apple新机，有锁机，卡贴机等！

看到大家经常把自己手机的截图发到吧里面求鉴定之类的帖子，很是担心，先给出鉴定方法，望大家以后不要把机身信息赤裸裸的发上来，要么到最后你的手机怎么失去的保修，怎么变成的黑机你都不知道。首先鉴定是否翻新，是否有锁无锁等情况请大家先用最简单的思维去想想，假如人家大部分商家都在卖4000块左右的时候，你在某宝找到一个连3000不到的或者3000多一点的机器，还让大家鉴定这鉴定那的，差了多少钱自己心里不知道吗？一分钱一分货。不要抱着侥幸心理去贪图那个小便宜。希望大家不要犯这种类似的错误，我会在下面把查询的方法和网址连接发给大家，自己动手丰衣足食。好了废话不多说。还是讲讲如何去鉴定机器的真伪以及有锁机和无锁机的方法吧。

先说说如何鉴定是否翻新机

1：首先看手机的价格货比N家之后再去做决定，现在网络这么发达，手机利润非常透明，暴力的时代早已经逝去，所以如果遇到某店家的手机价格比其它店家便宜几百块的，这种肯定不是好货。永远记住买的没有卖的精这句话。

2：直接https://selfsolve.apple.com/agreementWarrantyDynamic.do?官网查询电话技术支持日期与保修截止日期。或直接拨打苹果官方服务热线400-627-2273.如果是全新未激活的，从你激活之日起，这个就可以算得出来。如果是官翻后封的，最起码也要有个300多天的保修。如下图：

3：拿到手机以后建议自己在用iTunes从新给手机刷到最新版本，这样可以避免套码覆盖机，这种机器你在关于本机里面看到的还有连接电脑第三方平台读出来的码都是行货。其实就是一种覆盖技术，如果你在刷一次机，这种覆盖机就露出原形了，立马变回了原来的序列号和IMEI号。

现在来说说如何鉴定卡贴机，有锁机等。

1：最直接有效的方法就是，刷最新版本。如果刷到最新版本，国内的手机卡可以马上激活解锁，并且短信，iMessage,facetime等都可以使用，那就应该是正常无锁机，如果这些功能用不了，那就有可能是有锁机内置了卡贴芯片。

2：打开此连接 http://iphoneimei.info 输入手机的IMEI号，下面会查出一些信息，SIM LOCK处如果显示Locked就是有锁，如果显示Unlocked就是无锁，当然毕竟是第三方，有时候也查不到。如下图：

鉴定方法还有很多种，我只是给大家列出了最直接有效的。下面在给大家说说iPhone序列号的事，里面都包含着怎样我们不知道的秘密。注：（以下内容转至**）
解读iPhone序列号：了解生产日期和型号
　　其实序列号可以告诉我们很多事情，只是咱们不会读罢了，今天我们来了解一下如何读懂iPhone的序列号。
　　1.首先是要获取序列号，不知道的请看教程：查询序列号判断设备是否是新机
　　2.iPhone的序列号的结构为：PPP Y W SSS CCCC,下面我们以序列号DNPGJC1UDTFF来举例说明如何读苹果iPhone的序列号
　　3.前三位PPP是生产厂家，对咱们普通用户没有具体含义，略过
　　4.第四位是说明生产年份，用20个字母表示的（26个字母中除去A,B,E,I,O,U），这里表示的年的开始为2010年开始，以每半年一进位，如C代表2010年前半年，D代表2010年后半年，本例中这里是G则说明该机器是2011年下半年生产的
　　5.第五位是说明生产周，用9个数字（1-9,除去0）和字母（26个字母中除去A,B,E,I,O,U,S,Z）来表示的，共27个，由于上一位字母已经说明是上半年或下半年，所以这里仅需要27个字符来表示，比如本例序列号的值是J,则说明是第15周，再结合上一位G的含义是2011年下半年，则说明生产日期是27 15 = 第42周，也就是2011年10月10日 – 2011年10月16日之间，对应表如下图：

6.再后面三位为设备唯一识别码，即C1U为随机字符
7.最后四位为设备型号，这个麻烦一些，有个不完整的对应表：

Apple Device 破解ipad, Iphone Resources

http://bbs.weiphone.com/read-htm-tid-775783.html

Root ACER S120 Liquid Metal

Acer Liquid Metal S120

• Official Firmware Update
• Acer Liquid Metal Tools
• Custom ROMs
• T&L 2.3.6 (4.000.13) ROM for Acer Liquid Metal
• CyanogenMod 7.1 ROM for Acer Liquid Metal (S120)
• MIUI port for Acer Liquid Metal (S120)
• Discussion of ACER Liquid Metal Custom ROMs

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Before you buy a new cell phone or new tablet, please try the following procedure to repair your device. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card. It is impossible to recover your data after doing a hard reset, so online backup is always important. For all of your data, a backup should be done on an external device, hard drive, raid system or media. With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place.

ACER S120 Liquid Metal hard reset

With the phone turned off, press and hold both VOLUME UP + VOLUME DOWN + POWER ON for 3-5 sec.

To hard reset Acer S120 Liquid MT Press Volume UP, THEN CAMERA KEY.  FOR CANCEL press Volume DOWN, then Camera key.

Performing a factory reset via settings

From the Home screen, press MENU, and then tap Settings.
Tap SD & phone storage > Factory data reset.
On the Factory data reset screen, tap Reset phone, and then tap Erase everything.

Acer Liquid metal S120 BOOTLOADER = VOLUME DOWN + POWER