I am developing mobile application in sencha touch 2.x.x. The problem i am facing is defining web service entry in the project. Right now my web service entry is in the store with proxy call using URL what if my web service URL get changed later app is uploaded. Even i wants create 2 web services one is for staging and second one is for production because if one web service fails backup web service should work. What if i created new web service once app is uploaded i don't want to release new version with same feature. Is there any way to change web service dynamically. Right now i am hard coding web service entry in the app level and using in store proxy. Provide me some suggestions.