Some companies have their own connection kits that give you everything you need to use the Internet anywhere you can get a cellphone signal.
This involves technology that uses cellphone signals and the Global Positioning System to determine where a caller is.
Jammers can also be used to block cellphone signals intended to set off bombs.
All buses have complementary wifi for passengers; available wherever a cellphone signal exists.
Finally, the missing parents, who can't get a cellphone signal, merit the involvement of a search team.
This ingenious feature means, first of all, that your laptop can get online anywhere there's a cellphone signal.
Few residents on the lake and/or areas on Lake George can receive cellphone signals.
One of the villagers climbed into a tree to gain cellphone signal and called the authorities.
There, a cellphone signal was available when we touched down on the runway.
A different approach - by design or happenstance, but altogether legal - is to block cellphone signals through construction techniques.