Sorry if this is mentioned a lot, but I usually don't tether my Macbook. I just found out that after tethering my Macbook to my iPhone 6+ for 10 minutes, I always get kicked off of LTE and reconnects as 4G. I have full bars. This has happened in 4 different locations in southern California. I'm on the Mobile Share plan with 25GB/month which I rarely use. Is this normal for the iPhone 6+ to go back to 4G after 10 minutes of tethering?