As the usual issues on Android SmatPhones, "too many pattern attempts" displayed on screen. This is due to many wrong attempts of entering wrong pattern code. The only solution here is to hard reset.
How To Hard Reset HTC SAPP300 aka TMobile MYTouch
1. Power off the phone.
2. Press and hold HOME button and POWER button at the same time until you see the triangle with exclaimation point. Release the two buttons that you are pressing when you see it.
3. Again press HOME and POWER button shortly. You must be directed to Android utility.
4. Using your volume key, choose "wipe data/factory reset", then press trackball to do the process.
5. Use your volume key again, choose "Yes--delete all user data", then press trackball to do the process.
6. Finally Reboot the system.
7. SMILE.
How To Hard Reset HTC SAPP300 aka TMobile MYTouch
1. Power off the phone.
2. Press and hold HOME button and POWER button at the same time until you see the triangle with exclaimation point. Release the two buttons that you are pressing when you see it.
3. Again press HOME and POWER button shortly. You must be directed to Android utility.
4. Using your volume key, choose "wipe data/factory reset", then press trackball to do the process.
5. Use your volume key again, choose "Yes--delete all user data", then press trackball to do the process.
6. Finally Reboot the system.
7. SMILE.