Xiaomi India — Network issues

Hey!.
I am using Poco X3. I am facing a lot of network issues like slow speed and bad network, despite having a good connection at my place. Other mobiles in my home, work perfectly fine and provide good speed and network, using the same sims I have in my Poco X3.
I have tried all possible solutions like resetting the network, reinserting the sim followed by a reboot, factory reset. But the problem persists.