Searching mobile number

Question

hi,
i am developing one application in C# .net and i have some fields including mobil number and i want to search a mobile .
but i have store the mobile in sequence like [phone]
and when ever i am trying to search mobile number 9862585896 it is not showing me a mobile number iot just give me blank. and when i am searching like 986 so it give me searching result

Thanks ...
Kamlesh