I am a software tester having 2.5 yrs. of exp. I want to switch my career in mobile testing. Currently I am new to it. Please let me know the ways how can I move to this domain, what additional qualification is required for that. As if I try to switch to another company in mobile testing then it'll ask for relevant exp. in same domain, but currently my exp. as a mobile tester is NILL. So, what I need to do to switch in this domain?