Learn how to convert 4G SIM to 5G Airtel with these easy steps. To convert your 4G SIM to 5G Airtel, visit the nearest Airtel store or use the Airtel Thanks app. At the store, carry a valid ID proof and request to upgrade your 4G SIM to 5G. If using the app, open it, navigate to “Upgrade to 5G Airtel,” and follow the steps to request a 5G SIM. Once you receive the new SIM, insert it into your device. Ensure your phone supports 5G for a seamless experience.