I use jQuery Mobile with HTML5 and CSS3.
When I upload my code to PhoneGap cloud build servers and place the app on my iPhone and start the app, I see the following splashscreen: 
The question now is: how can I override this image?
Do note: I’m not using a regular phonegap project (e.g. in Visual Studio), but just an index.html file with js and css files.
Thanks!
You can get some valuable information from here. This is from official Phonegap team. Also you can look into this too.
Hope it helped you.