If you want to visit the holy place of Shri Mata Vaishno Devi, katra then this would be helpful blog for you. 
Reach the place:- If you go with your family then try to book ticket directly to Katra Station because some train go only to JAMMU tawi them after you have change the train to katra staion., then take a auto or by foot to bus stand .There you will get the "yatra parchi", which is free f coast and very important during whole trip.
Yatra parchi:- you can get yatra parchi from Bus stand or get it online from the offical website of Shri Mata Vaishno Devi, katra:- https://www.maavaishnodevi.org/ ,
- here u can book helicopter ride in advance.
Mobile Network:- Having a BSNL sim will be helpful.because there is no other mobile netwrok.
Convinent Way to Bhawan for Pedestrain :- you'll see the new way named Balini track from check post(2800ft.),(where your yatra prachi will be checked) to Adhkuwari(4800ft) which is less inclined and easy to track.
from Adhkuwari u also continue to the same way to Bhawan(5200ft.).
*note:- if you take helicopter ride then it will drop you to sanjichhat(6200ft.) then you have go down to BHAWAN(5200ft.) of about 2.5km
THANKYOU
HAVE A HAPPY AND SECURE TRIP