I am trying to reactivate Google Voice on my sprint line, but I keep getting an error message during the process. I use a Galaxy S7. I have no idea how it was deactivated, but oh well. Here's the steps I've taken:
Years ago when I was still in Customer Care, I had a very similar issue with another customer. By chance, @loyolagrad, do you have Selective Call or Text blocking enabled on your account for this number? If so, you'll want to log into your Sprint account, turn off Call Blocking (this is temporary) and then try the integration process again.
Once the GV integration is complete, you should be able to re-select Selective blocking.
Give that a shot and let us know if it works.
AFAIK, the *28 conditional forwarding is gone. The support pages for call forwarding no longer mention it. There are a ton of posts all over the internet about it with very little real answers. Just some anecdotal stuff about how someone got the right rep and they were hooked up, etc.
I called a few times and tried to talk someone into what some posts recommend. Put it on my account manually, disable wifi calling, no one could get it working. Then I realized that it's not documented anymore because Sprint took it away. Maybe some reps who have been around for a while know backdoors to hook you up but I couldn't get off the ground.