Hi, I want to get started with mobile development , I know HTML,CSS,JavaScript,PHP and C#. What is the best way to get started? I know that for example, if i want to create an iphone application i need to know objective c (and get mac),Which language is the best for mobile development (and cross platform - works on Nokia,IPhone,android,palm,Blackberry).
Yosy
A quick look on SO found: Getting started with mobile development and What mobile platform should I start learning. I'd start there. As for which language works best - that's an entertaining question - personally, I think if you can build your app so it works in a browser is the closest you're going to get to a "cross platform" language.
Get started. Pick a platform and jump in and do it. If you're a Mac user I expect you would enjoy iPhone programming more. If not, I suggest Android (although you can do Android dev on a Mac.)
If I recommend iPhone as the best platform to develop on I can bet money on someone disagreeing with me. Every opinion you read is just that, opinion. Your best course is to think about what platform you like using and whether you have any ideas about ways you would like to use it that haven't been done to your satisfaction. Then, get started - don't read about getting started. Download the tools, look at some sample code, go!