CellMapper

Select the operator and technology, then narrow the map by location, band, date or accuracy filters. Distinguish tower markers from measured signal trails and inspect verified/unverified status. CellMapper’s FAQ explains that uploaded Android observations are processed on its backend; a calculated tower position can be wrong, particularly with uneven measurements or inaccurate phone/GPS reports. Low-accuracy towers use a simpler best-signal location fallback. New map data may take minutes, days or up to a week to generate. Editing requires login. These collected observations help investigate network layout but do not guarantee indoor reception at an address.