Hi. Pull out the battery and then replace it and then power it back on again and observe. Alternatively, you can press and hold the power key/button for 8-10 seconds to force restart the VF685 of Smart Kicka. If all else fails, then try wiping the cache partition - if that fails, wipe data and factory restore it (this measure will delete all your apps and it data and restore everything to factory defaults). Here are the steps http://www.satechhelp.co.za/479/Hardreset-Vodafone-Vf685