If you solicit help you should ask questions properly. Also, let everyone know what you are trying to do.
JavaDoc
TelephonyManager.getNeighboringCellInfo() return a List of neighboring cell information in a
NeighboringCellInfo object, including Received Signal Strength and Cell ID location.
Since, you have mentioned the name of the function, I assume you are doing the same. Can you post some source code?
Have you added necessary
ACCESS_COARSE_UPDATES permission?