[195954] in North American Network Operators' Group
Re: USA local SIM card
daemon@ATHENA.MIT.EDU (Ryan Wilkins)
Sat Sep 23 04:07:48 2017
X-Original-To: nanog@nanog.org
From: Ryan Wilkins <ryan@deadfrog.net>
In-Reply-To: <59BEDDBD.9040507@netassist.ua>
Date: Sun, 17 Sep 2017 17:48:38 -0400
To: Max Tulyev <maxtul@netassist.ua>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
> On Sep 17, 2017, at 4:40 PM, Max Tulyev <maxtul@netassist.ua> wrote:
>=20
> Nice advertising, thank you! =3D)
>=20
> But still have open some questions I asked before:
>=20
> 1. My phone is not LTE but 3G GSM/UMTS capable (all bands,
> 850/900/1700/1900/2100). Will it work? Is 3G coverage good enough in New
> York and Orlando for VoIP calls (SIP, Viber, Skype)?
This limits you to using either T-Mobile or AT&T since they're the only nati=
onwide carriers using GSM/UMTS.
T-Mobile's network on GSM for data is garbage, but they've got UMTS deployed=
in many areas, however, there are areas which only have GSM and LTE service=
. Those are more likely to be areas where they never added UMTS but did add=
LTE when they started on their LTE deployment 3 or so years ago. I haven't=
kept up with where UMTS is deployed these days on T-Mobile but it's either A=
WS-band (1700/2100 MHz) or PCS-band (1900 MHz). Their coverage has gotten a=
lot better, but that's primarily in LTE deployed areas. I don't think they=
're doing much to expand their UMTS footprint.
AT&T is going to be similar but I'm less familiar with their network and can=
't speak on it as much.
Latency will be higher on UMTS but you can still use VoIP services, but perh=
aps with some additional audio dropouts. Your mileage may vary.
>=20
> 2. Is there public or private IP address? IPv6?
With standard service, I'm not sure if they support inbound connections to t=
he phones or not. I've never tried. I suppose that could be worked around w=
ith a VPN. I believe that IPv4 is run through NAT but IPv6 might be a publi=
c IP. Again, I haven't tried to access a network this way over cellular.
Best,
Ryan Wilkins
