This cellphone signal map is brought to you courtesy of OpenSignal.
OpenSignal is the leading source of insight into the coverage and performance of Mobile Operators worldwide. Our data is crowdsourced by users of the OpenSignal app, downloaded over 15 million times, which constantly monitors the coverage and performance of their mobile connection. We use this data to increase transparency in the wireless industry by publishing reports on the quality of mobile networks, offering unbiased coverage maps and empowering people with the information and tools they need to get better mobile connectivity in a hassle free way.