Airtel is rolling out 5G across the country, giving users a super-fast internet experience. If you've just bought a new Airtel 5G SIM or switched from a 4G SIM, you need to activate it. This activation process is simple and can be done via SMS, online portal, or an Airtel store. Whether it's a physical SIM, eSIM, or a deactivated SIM, this guide gives you all the details you need.