How can i start my android 4.0.4 phone?

[AC Question]

Hi, I hav an android 4.0.4 phone (model-Mtech opal). I try to change the font style through an app (HiFont, available on Google Play Store). And when I done it, then I got a pop up box with a msg, to change the font reboot your phone, with two option reboot now & reboot later. then I choose reboot now option, & after that, I can't start my phone..

 

[B. Diddy]

Welcome to Android Central! Did you have to root the phone?