2G 

2G network deployments are still a source of connectivity for global IoT deployments and are used widely in some legacy device deployments. Many new LPWA radio modules still support 2G along with LTE-M and Narrowband-IoT to offer as close to global coverage as possible, offering a single SKU solution that is a more sustainable choice than building multiple SKUs. Only choose 2G as a primary technology if there is no other coverage type in the deployment area; otherwise leverage the newer technologies for better power optimization features.