I have Redmi note 3. I am using Jio and BSNL sims. I have observed that since last 3-4 months, whenever I tried to make call to few Jio numbers, it shows call ended immediately on calling. The same number working fine from BSNL. What could be the issue? I have checked one more jio sim in the phone. It is having the same issue. So the issue is in phone not sim.
Issue could be related to 4G VoLTE service