Thanks for your response. I ask because there is a known issue from Sprint technical support about the iPhone 6 having an issue holding an LTE signal, more specifically, band 41. My phone is constantly hanging onto band 25 for way too long (-118dbm signal) without switching to band 26, and just dropping me to 3G. They claim a fix is in the works, and should be pushed by the end of the year (we all know how Sprint is with software release dates, so we shall see). I can't recall Sprint ever "pushing" a carrier update to my phone since I've been with them. T-Mobile used to do it back in the day, and I know these bundles usually just come with the next iOS update.
Sent from my iPhone 6