TRICKS IN PROGRASS.........

Unfortunately, this app tool might not work on more recent Android phones. This guide provides a list of instructions for rooting several specific phone models.

4. BACK UP YOUR CURRENT FIRMWARE AND PHONE DATA

You really want to do this if you need to re-install your phone's original firmware and data later (e.g., something goes wrong when you install the unofficial Android firmware; you decide you don't like CyanogenMod or MIUI; or, you need to reactivate your phone with its carrier, something which you cannot do when running either of these unofficial OSs on it).

The easiest way to do a back-up is to install ClockworkMod ROM Manager on your phone. Run this app, and select "Reboot into Recovery" from its menu. This downloads and installs a recovery image profile for your phone, restarts it, and loads a plain-looking text menu, where you can select the back-up process.

After the copy of your phone's firmware and data is made, you can move it to a computer for safekeeping. Connect your phone by USB cable to your computer, then simply drag-and-drop the backup's folder (it's on your phone's SD card under the folder "clockworkmod") from your phone's SD card to the latter device.

5. PREPARE GOOGLE'S DEFAULT ANDROID APPS FOR INSTALLATION

If you're installing CyanogenMod: Unless you want to keep your to-be-upgraded phone clean of Google apps, you'll need to install them separately. CyanogenMod does not include the standard Google apps that typically come pre-installed on an Android phone. So you'll have to download a ZIP file that contains the installation packages for apps such as Google Search and, most importantly, the Android Market. Put this ZIP in the main root directory of your phone's SD card.

6. INSTALL THE CUSTOM ANDROID FIRMWARE

This is the big deal. Download the CyanogenMod or MIUI firmware designed specifically for your phone model, which comes in the form of a ZIP package, and save it in the root directory of your phone's SD card.

Once again, run the ClockworkMod ROM Manager app, and select "Reboot into Recovery." After your phone restarts into the ClockworkMod Recovery tool, you may need to wipe out its data and cache, and format its "/system" directory -- this depends on whether you are installing CyanogenMod or MIUI, so you should refer to the instructions that specifically are for your phone.

Next, you select the ZIP file of the custom Android firmware you placed in the root directory of your phone's SD card, and start the upgrade process. It normally takes less than two minutes. If you're upgrading to CyanogenMod: Don't reboot your phone just yet... repeat the above step for the ZIP file containing the Google Android apps.

You return to the main menu of the ClockworkMod Recovery tool and select to reboot your phone. After about 2 minutes, it should boot and then run on the custom Android firmware.

7. ENJOY YOUR NEW ANDROID PHONE!

Besides updating your phone to a more recent version of Android, CyanogenMod and MIUI can also give it new features and tools, which include better power management, Wi-Fi tethering, stronger security settings, and broader personal customization of the UI. Many users report their phones run faster with one of these unofficial OSs than with the version of Android that came originally installed on it.