I dont think its a problme with the s6 attenna design, if it was my girl friend's s6 on Bell would also have the same problems which she has none of, she can wander around the house no dropped calls at all.
I've been having problem also with my S6 for months now, lots of missed calls, dropped calls, the ONLY solution I have found is to force my phone to opperate only in GSM, if I do that I have no issues at all. As soon as I switch to HSPA and or LTE I ...