Can anyone help me Confirm Whatsapp last seen Trick?

[The Day Dreamer]

I went to Whatsapp official

http://www.whatsapp.com/faq/android/23225461

As, they said that it's not possible.

Then I tried this http://www.techanger.com/disable-whatsapp-last-seen/.

I installed it, but not sure if its working because the person at the other end said that it is showing last seen 2 hours ago.

Edit: I have Xperia M cellphone

Can anyone please help me confirm if it really works?

Thank you in advance

 

[The Day Dreamer]

Finally after two weeks, took phone of my cousin and tried it. It works