IOS8.1 signal problem with iPhone 6?

Question

I never had problems updating my phone until iOS8.1 came out.
Here is the odd thing, my phone constantly fluctuates from having full bars to none at uneven intervals. My wifi will be stable, but my signal is wrecked. I missed calls the night I updated, and didn't realize it until I got a worried text from my boyfriend. Is anyone having similar problems?
I reset my phone twice, once through iCloud and once through iTunes. When the problem persisted, I reset the network settings and nada.
Imagine being stuck in a dire situation and not have a reliable phone. THAT is scary.

Answer 1

As I said in another thread, I have iPhone 6 with iOS 8.1. I commute every day for 40min from home to work and back, and there are two places in the route that I know have very low signal coverage and are a very good test for mobile phones antennas reception.
With my previous iPhone 5s, in these two places during a call it happened to lose some voice samples, but the call was never dropped.
With the iPhone 6 the calls are always dropped in both places.
I don't look at signal bars because they are only a signal indicator, but the dropped calls are a clear fact that the iPhone 6 reception is worse.
Also the iPhone 4s was worse than the 5s but better than 6 because it lost many samples, the voice became metallic, but very seldom did the calls drop completely.
Unfortunately with the 6 dropped calls are a certainty.