I heard back from my friend, he said that after talking with some people on the Engineering side, it is most likely an issue with "Grey IMEIs" (aka unbranded handsets) and most likely with Grey LTE IMEIs.
The issue is that unbranded handsets are low on the totem pole with regards to ensuring 100% uptime as at&t's official stance is that they do not support unbranded handsets. However, they did say that the at least in the Metro NYC they did have some of their gear in testing and it could in theory cause problems like what we have all been complaining about here.
Dan
At the risk of jinxing myself, my Nexus 5 with AT&T is excellent.
But to explain away your trouble with AT&T's priority list and unbranded phones? Unacceptable. It doesn't matter if you bring your own device, especially now that AT&T no longer subsidizes devices (AT&T Next has you paying full price for the phone in 2 years worth of monthly installments; the "discounted" price with a two year contract eliminates an otherwise standard $15 or $25 monthly discount on your data plan, to be sure you pay them the full price for the phone over two years).
If you have an authentic AT&T SIM card in your phone and you are paying AT&T for monthly cell phone and data service, it should work. If it doesn't, it means they are taking your money but not providing such service. Get a lawyer.
i'm continuing to have the issue so i just set preferred network to 3G and will leave it like that until Lollipop.
Is there a big difference in reception when switching to 3g or even 2g over LTE?
with BYODs, ATT (nor tmobile) **can't** fully control the QoS via the IMS core, which implements their IP telephony (wifi calling / volte) -
it would wreck havoc on the party crashers like the nexus 5, & other unlocked devices, maybe even native carrier devices, when they make upgrades to retrofit IP telephony via IMS..
& it's not so much an IMS issue (that expounded the lte issue), but it's how lte was retrofitted on legacy networks to begin with, & with the changing of QUALCOMM's chipsets - the combination threw skates underneath how both the devices & networks inter-acted..
I already linked this thread over at xda, it's only fair that you all get a birds eye of what they're talking about over there too -
Calls made when on LTE keep getting dropped | Google Nexus 5 | XDA Forums
I went there long ago there -
[Q] a nexus 5 e.csfb issue - Pg. 2 | Google Nexus 5 | XDA Forums
& asked for help troubleshooting for this lte IP handover issue, ( it wasn't just a sprint issue I found).. I guess I was wearing the wrong shirt or shoes in that thread.. no1 participated..
but oddly, it came full circle in the **Calls made when on LTE keep getting dropped** thread.. go figure..
Does anyone here use google voice? (I do)
Does anyone here use google voice? (I do)