iPhone 6 Plus - no option to decline calls
I am facing a strange issue since I migrated tI iPhone 6 Plus from iPhone 4. I used to use the feature for declining calls often. The feature where you could decline the incoming call and send the "can't talk right now" SMS. however since I upgraded I am not getting this option of declining the call.
i do get the option like 40% of time, but not the rest. I get the option for the same caller at times and at time I do not get the option for the same caller. Please see attached images.
KIndly help in solving this issue.
iPhone 6 Plus, iOS 8.1.2