You can forget free hotspot usage with Sprint on the Nexus 5. You can't even do that with the Nexus 4 on T-Mobile. With Tmo on the N4, you can turn on the hotspot and start using it without any issues. And if you use a small amount of data, all is good. But if you start streaming or running speed tests, you will get hit with a Tmo paywall in your browser window.
On Tmo it cost me $15 per month additional and I got to add hotspot usage to my plan. I paid the fee directly from the pay wall. I wasn't trying to bypass any charges, I just assumed that I could use my existing 5GB plan with the N4 hotspot feature. I didn't mind paying for my hotspot usage if required. But every month I would hit that pay wall again and have to pay for it. And this was on Tmo LTE. I didn't seem to hit the paywall on Tmo WCDMA.
I'm fully expecting the same thing with the N5. Whether on Sprint or Tmo. It will either be locked down and you have to add a hotspot plan, or you will be able to turn it on and connect, but hit an authorization screen in your browser that you must authenticate (or pay) to get an actual internet connection. It will probably be the latter, as a means to stop hacking the hotspot feature. They will allow you to turn it on and connect. But if you want to get through the internet gateway, you're going to have the appropriate plan or pay.
No free rides on the Nexus 5 train. Stealing free internet from Sprint is coming to an end. I'm sure someone will be able to find a way to hack it. However, why don't people pay for the services they use?
Robert via Samsung Note 8.0 using Tapatalk Pro