iphone not switch on

[johnla781]

why will not my iphone switch on.

 

[Major_Trouble]

Battery is flat

 

[johnla781]

how to check battery is flat or not

 

[Major_Trouble]

Phone won't turn on

 

[johnla781]

yes, my iphone will not turn on and i have also installed a new battery.

 

[Major_Trouble]

Are you sure it's an iPhone as the battery is not a user replaceable part?