Not sure what is going on but I have been having TERRIBLE service in Mission Valley, National City Mile of Cars most of all, and Escondido. I am mostly on 3G in these places 90% of the time.
Had an emergency on Friday, mother in law in hospital, and I couldn't even load Maps to get the hospitals address! texts coming in 5-10 minutes late. Unacceptable. I live in La Mesa and even here service is pretty shitty. Feels like I am on 3G when using LTE.
I have the S5 on latest PRL.