Everything about Cellular networks

Cell networks Monitoring:

https://cellmapper.net
https://4pda.to/forum/index.php?showtopic=820777

UMTS and LTE bandwidth and frequencies:

https://docs.google.com/spreadsheets/d/1Fl5g_DjS0F_ncfDNPZ-dsK40CfX0XFD7/edit#gid=498619219

Cellular network coverage map

https://www.sit-com.ru/map.html