Finally I find the solution myself
This is my first ever Smart phone,Vodafone black smart. I have charged up to 15 hours on the day of purchase. I go to work at 7am, we are not allowed use phone at
work,so phone just rest in my pocket,i come home, just text 4-5 friends and max 20 minutes call to family, my battery flashes orange
I was advised some of my friend smart phone s battery are only last 1.5 day mx 2 days. But my phone now even 12 hours
I brought back to store, the girl in shop said the same sh..t, if you talk too much on phone,and internet battery last only 5-6 hour,i said i m not happy with the unit, i want replace battery,So did.
On my second Vodafone Black smart one,wi-fi connections are failed.I can see all wifi available,enter password "Disabled,wpa2 ......" no connection
All wireless function settings are on, Rang customer service 15 times,Issue not solved,I have search on net and not fixed.Put the phone back to factory settings, NOT OK,
Then I have Disabled/Enabled Airplane mode in Wifi settings, I connect my router no problem.