Home » QAQuick Answer: How Can I Upgrade My 2g SIM To 4G?ContentsHow can I convert my Airtel 2G SIM to 4G by SMS?How long it takes to upgrade a 2G SIM to 4G SIM?How can I change my 2G SIM to 4G?How can I convert my Airtel 2G SIM to 4G by SMS?.How long it takes to upgrade a 2G SIM to 4G SIM?How can I change my 2G SIM to 4G?