ESP32 Compatible SIM Sensors

Cellular modules split by network generation, and that is the first thing to check - against your local coverage, not the spec sheet. The SIM800L, SIM800C and SIM900 are 2G GSM: cheap and battle-tested, but 2G networks have been switched off in many countries, so confirm yours still runs one before building on them.

For current networks, the SIM7000 and SIM7080G speak LTE-M and NB-IoT - the low-power IoT bands - while the A7670 (LTE Cat 1) and SIM7600G handle regular LTE data. The SIM808 and SIM868 bundle GNSS positioning with cellular. Whatever you pick, budget for power: these modules pull multi-amp bursts during transmission and brown out weak supplies.