FRIENDS I AM USING BLACKBERRY Z 10 PHONE IS REALLY GOOD FOR LOOKING WISE BUT THE CREATE SO MANY PROBLEMS AFTER PURCHASING 6 MONTHS AUTOMATICALLY SWITCH OFF AND SWITCH ON CONTINUALLY ITS SO IRRITATING AND NOT GO LONG TIME BATTERY BACKUP ITS A BIG DISADVANTAGE IN THIS PHONE SO MY FINALLY OPINION IN THIS PHONE IS NOT GOOD I CANT SUGGEST MY ANY FRIEND TO PURCHASE THIS PHONE THEY CREATE SO MANY PROBLEMS