Patent ID: 8712402

Claim:
A method comprising: on entering a network of a Home Network Provider (HNP), a cell phone receiving a signal strength threshold and time information from the HNP; receiving signals at the cellphone from n base stations of the Home Network Provider (HNP), where n≧1; determining signal strength of one of said signals received from said n base stations; in response to said signal strength being below the signal strength threshold, appending to a log file information about said signal strength and information about geographic location of said cellphone; said cellphone sending said log file in response to one or more conditions being satisfied, the one or more conditions including that a number of entries in said log file is above a predetermined number; when said sending is deemed successful by receiving a confirmation message within a preselected time period, said cell phone resetting said log file and if said confirmation message is not received within said preselected time period, resending said log file; and in response to said signal strength being above the signal strength threshold waiting to redetermine signal strength according to the time information provided by the Home Network Provider.