Problems with conference calls(adding and merging calls) after upgrade to ios 8.1.2 on iphone 5s
I am having weird problem intermittently with adding calls or merging them or swapping them. The issue happens 8 out of 10 times whenever I try to do a conference call. This issue came up after I upgraded to 8,1.2. Never experienced this in 8.1.1 or previous version.
Some of the scenarios that I have experienced is:
1. While on the call, when I try to add a new contact, it just doesn't dial the second number.
2. Sometimes the second number gets dialed, cannot merge the calls.
3. After talking to the second person, cannot go back to the first call.
I am very sure that this is not a carrier issue as it worked flawlessly before upgrade.
Anyone experienced this before? Any suggestions?
iPhone 5s, iOS 8.1.2, Carrier : Airtel, India