Good luck getting a fix. I have had the same problem and have spent countless hours (about 25 hours) of troubleshooting with VZ. Their final answer was sell me a network extender or let me out of my contract for another provider. Very terrible solutions if you ask me.
I have:
Reset network settings
Restored phone and tested before restoring the backup
Messed with data roaming and Voice and data LTE settings (per VZ)
Replaced SIM card
Returned device and got a new one
I live in Peoria AZ (85345) and work in Downtown Phoenix AZ (85004) Bad service both areas
Was in Denver CO for work with same issues.
I've spoken with about 6 tier one tech support with very little help, just basic steps ive done over and over.
Talked to maybe 3-4 tier 2 tech support and i swear it was pulling teeth to get them to send me a new device even after the last tier 2 said test for a day and call back if not better and well send a phone. Communication between employees is terrible and even worse with the customer.
I kept getting texts "were still working on your ticket please allow 24-48 hours for an update"
would get same text 2 days later. after that they send a text saying "were still working on the ticket well get back to you when its done."
10 days later I call like "where we at? they say, "your ticket was closed a week ago and they said it was a spotty coverage area"
That was extremely annoying because i gave them three address, in 3 cities, and 2 states yet they only look at one.
Calls seem a bit spotty
texts work
but playing video or loading pages are the worst. I seriously sit there for like 20 minutes trying to watch a 2 minute video (very frustrating)
Download speed tests are never over 2mbps. Usually they are in the range of 0.10 - 0.30 Mbps
These issues have been going on for close to 2 months now. I do think it either has something to do with iPhone 6 and/or 6+ OR Apple's 8.3+ software.
I have since upgraded to 8.4 with no resolution. It should be noted I used to get 20-45Mbps down.
Dont get me wrong I dont mind slow speeds here and there but unusable speeds are unacceptable. I also have a problem that Verizon isnt trying harder to replicate the issue and resolve it. They would rather lose me as a customer than deal with the issue. Based on this post and others I have seen on the VZ page I am not the only one with the issue nor just my state, It's nationwide. I dont believe I should be paying a full bill when my phone doesnt work the entire time im at work (no wifi). They offered me 15% off for a year.
I want VZ to recognize this is a problem and work on a resolution not just brush it off like nothing is happening. Especially since I have seen multiple posts from different cities with the same issue. how hard can it be to get an iPhone 6 or 6+ on 8.4 and replicate the issue?