I am developing an application which retrieves the cellid and location area code whenever there is a change in cellid. It is working fine in the 9.2 phones but, it is not working in 9.1 phones. I am using the API iTelephony::GetCurrentNetworkInfo() for retrieving the cellid and location area code and iTelephony::NotifyChange(); for notifying the change in phone network. Please let me know what could be the reason . Thanks in advance.