If you had forget the password/pattern lock of Panasonic T45 or it has been stuck/hang on logo or White screen appears on booting. Then with the help of combination of keys you can Hard Reset your android device. Follow the steps:
1- Charge your device upto 70 percent.
2- Switch off device.
3- Press & Hold Power + Volume up until Android logo with red exclamation mark appears
4- Press Power key once to Enter recovery mode.
5- Using Volume down key, select Wipe Cache Partition and press Volume up key to confirm.
6- Using Volume down key, select Wipe Data/Factory reset.
7- To confirm Press Volume up key.
8- Using Volume down key, select Yes-delete all user data.
9- To confirm Press Volume up key.
10- Data will be wiped then press Volume up key to reboot system.
11- Pattern has been reset and phone is free from lock.