BittuKumar_UpluUiSTMD I’m not sure whether the issue was with Airtel or my Nothing Phone 2a, as I faced the same problem.
Airtel 5G was not working on my device, while other family members had no such issues in the same location. I have now ported to Jio 5G, and I can use unlimited 5G without any problems. It might be an issue with both Airtel’s NSA 5G and the Nothing Phone. I’m not a tech expert, so feel free to correct me if I’m wrong.