OpenCellID - OpenCelliD is the largest Open Database of Cell Towers & their locations. You can geolocate IoT & Mobile devices without GPS, explore Mobile Operator coverage and more!
Fastah 4G Finder - Fastah 4G Finder app contains features through which you can access a color map to get an idea about the speed of the internet on your current network.
wigle.net - WiGLE (Wireless Geographic Logging Engine)
NetMonster - NetMonster is a networking app by Michal Mrocek that comes up with features to enable you to get detailed information about your current network right on your mobile phone screen.
Proxidize - Proxidize is the world's premier self-hosted 4G mobile proxy solution! With Proxidize at your fingertips, building a 4G mobile proxy network of any size is a breeze - absolutely no technical expertise required, we got you covered!
NetMonitor Cell Signal Logging - NetMonitor Cell Signal Logging app helps you in receiving accurate measurements of the speed of the internet and the strength of signals to choose the correct network according to your needs.