I have Done many projects with GPRS and RFID based concepts. I used RFID in Driving licence Test automation system, attendance system, Gate opening and closing system and various other projects too, I worked with both passive and active rfid cards
For GPRS i came across 2g, 3g and 4g modules for various projects have good experience in SIMCOM and Quectel modules, very familiar with SIM800, SIM5215 and sim7500, in quectel i worked with M66, Mc60