Today I was musing that my clock is 1 hour off. I'm on the western edge of eastern time zone. Across the lake (about 90 miles) is the central time zone and it's not uncommon for my phone to pick up those towers and thus reflect central time. Why it does that, instead of connecting to the tower about 10 miles east of me, is a mystery to me.
Anyway, I wondered if this could have anything to do with my rild problem so I went to the Data Manager settings and unchecked Data enabled and Background data. My battery dropped about 5% in 30 minutes which seemed a bit high to me but when I went back and checked the boxes in Data Manager again it dropped about 10% in 10 minutes!!!
It would appear that just what you are saying, Dave12308, is happening.