Magic Tricks

I initially thought this effect used a different method, but I was happy to see you actually never have to touch the spectators phone.
That being said the whole trick is not that strong and could leave a lot of questions in their minds.
I do not regret getting it for $10 but I dont think ill be using this often, if ever.
My suggestion will be to perform this after you get a feel for your audience, if they are easy to fool then it will do great; however if you are performing for someone who might ask a few questions, they will figure out the trick in no time.