magicJack and magicJack Plus Support, Reviews, FAQs and Tricks

can anyone help me with this?

Hi,

I have a magic jack device. But i dont know the magic jack number.
one of my friend has sent it to me as a new device. But its not a new one.
already registered but he forgot the number and email also.
Then how can i use it? can you please do the needful asap?

Thanks
Raja