@mmariansky Fortunately, iPhone doesn't allow access to such data if Location Services are switched off. However, IP geolocation still works; so an app developer who requests our API will be able to know the country / city you belong to. In Android, there are reports that Ad marketplaces have access to Cell tower data even if positioning is switched off. We haven't verified this yet, though.
With over 511.41 million WiFis & 58.91 million Cell Tower objects, it claims to have the most extensive database in the world across all leading WiFi & Cell Tower technologies (GSM, CDMA, UMTS, LTE).
Doodle
LocationAPI
GrowthHackers