This works for android 2.2.1.
I am unsure if it works for 2.2.2 but you can try to see if it works.
First thing you want to do is make sure you go to your settings and select Unknown Sources. Then select development and select USB debugging.
After that you can go to http://forum.xda-developers.com/showthread.php?t=1049944 in your phone's browser or your computer and download the GINGERBREAK APK File provided on the site.
After you download, you can also drag it to the root of your SD card by connecting it to your computer and selecting "Turn on USB storage" and dragging it to your SD card.
After you download the gingerbreak apk file go to your thinkfree office app and select it, it will say "content not supported" which is ok, just select ok to continue. After you install the app, it may say that it is a virus, again, which is ok. Select Root and it should take about 2-3 minutes until it goes to reboot. After it reboots, you should see an app called "Superuser", that is confirmation that your phone is now rooted.
After that, you can go to the android market and install "Root installer". This app is to delete the bloatware that Metro PCS installs on the device that you may not want or need.
Apps safe to remove:
AnalogClockWidget.apk - Analog Clock widget
Boingo_Wi-Fi.apk - Boingo WiFi
Calculator.apk - Calculator
Calendar.apk - Calendar App
CalendarProvider.apk - Supports the calendar. Remove only if Calendar.apk and CalendarWidget.apk have been removed.
CalendarWidget.apk - Calendar Widget
CarHome.apk - Car Home - Remove CarHomeLauncher.apk if this is removed.
CarHomeLauncher.apk - Car Home Launcher - Linked to CarHome.apk
ClockWeatherWidget.apk - Clock Weather Widget
DeskClock.apk - Clock app
DigitalAlarmWidget.apk - Alarm Clock widget
DualClockWidget.apk - Dual Clock widget
Email.apk - Email app - Safe to remove if you use Gmail or some other email app
GoogleQuickSearchBox.apk - Google Search widget and app
Homeselector.apk - Home Selector - Will not work if LGHome.apk is removed
LG-MS690_MetroBackup_1.27_PRODBuild_10082010.apk - MetroBackup
LGHome.apk - LG Home launcher - Safe to remove only if another launcher is installed. Home Selector will not work if this is removed.
LGMS690_MetroNavigator_4.9.1_Build_57_10222010_rel _signed_PROD.apk - MetroNavigator
LGMS690_MetroPCS_EasyWiFi_V4.0.90.apk - EasyWiFi
Loopt_Android_2.4.1_Oct.13.2010.apk - Loopt
Metro411.apk - Metro411
metroappstore-v1.3a.apk - MetroPCS App Store
MobileBanking.apk - Mobile Banking
MobilePosse.apk - MyExtras
Mocospace-1.2.4.apk - Moco Space
MPCS-MobileIM-0.4.24.2.apk - MobileIM
Music.apk - Music Player
MVC.MetroPCS.android02.apk - Virtual Card
PEX-18.104.22.168-metro-rc.apk - Pocket Express
PGA_Android.apk - Free Games
Protips.apk - Tips widget
RSSViewerWidget.apk - RSS Reader
SNS.apk - LG Facebook and Twitter app
Talk.apk - Google Talk
thinkdroid.apk - Think Free Office
UNO_DEMO_LG_MS690_EN_NONIGP_MetroPCs_TS_307.apk - UNO Game
YouTube.apk. - YouTube video player
z7-android2x.apk - Mail@Metro
These apps SHOULD NOT be removed:
Browser.apk - MetroWEB - Required for Android Market
Phone.apk - Phone app/dialer
Settings.apk - Settings menu
IMPORTANT!!!! Save boingo wifi for the last app if you decide to delete it instead of freezing it, like i did, it may cause your phone to corrupt. if it does just restart your phone and everything should be good.
**DISCLAIMER** I am NOT RESPONSIBLE if you brick your phone.
If you have any questions feel free to leave a comment or if you want a quicker response you can message me on KIK messenger @ Wo87pooh and i will answer your question and help you right away.
Please like the following pages for my sponsored giveaway!
Follow me on instagram @iRoKKSMiiLEz or click this link to follow me from your computer