Go to your blog dashboard.Under settings tab you find an option "Email & mobile" click on the that.
You find an option of enabling the mobile version of your blog. You can preview it. And there is also a QR
code, on scanning this you can check the mobile version of your blog on your mobile instantly! Isn't it great?
Though you cannot customize the mobile template, the default one looks great! Now, all the blogger uses can now target the mobile users as well!