>> gives any Android phone the ability to make and take calls over Gizmo5's
>> VoIP service, connected through a Google Voice phone number. It works over
>> Wi-Fi, 3G, or, for the daring, EDGE. You probably won't want to use Guava as
>> your primary phone call manager, as the call quality varies with your
>> connection and really works best over Wi-Fi. That said, if you're running up
>> against your minute allotment, or find yourself in a basement-like spot with
>> decent Wi-Fi but really bad cell coverage, Guava is a great little tool to
>> have at your disposal.
>>
>> It's also worth noting that, depending on who your carrier is, making a
>> VoIP call over an EDGE or 3G network may violate your contract's terms of
>> service. A little "hard" data use now and then likely won't be noticed, but
>> if you plan on using Guava heavily with your cellular data plan, you should
>> check and read into what's tolerated and what's not before embarking on your
>> bold data-only adventure.
>> Mark, will you let us know how it goes?
>>
>>> On Sat, Jan 22, 2011 at 9:01 AM, Mark Phillips
>>> <
mark@phillipsmarketing.biz> wrote:
>>>> This is not totally off topic.....Android is based on Linux....;-)
>>>>
>>>> I need some advice from an expert in networks to give me some advice on
>>>> getting my phone to make WiFi calls....
>>>>
>>>> Anyway, I have a T-Mobile MyTouch 4g phone. It is supposed to be able to
>>>> make calls over WiFi, which do not use an plan minutes...ie "free"
>>> calls. I
>>>> depend on this phone for my business, and I have a wireless network at
>>> the
>>>> office, so I don't have to pay for gillions of minutes. This worked
>>> great
>>>> when I had my Blackberrys - I could talk all day in the office and not
>>> use
>>>> any minutes. All of this is above board with T-Mobile - I actually pay a
>>> low
>>>> monthly fee for unlimited WiFi calling.
>>>>
>>>> Anyway, much to my chagrin, I discovered yesterday that I had gone way
>>> over
>>>> my plan minutes. I checked with T-Mobile, and none of my calls had gone
>>> over
>>>> WiFi. The agent refunded all the charges for the over-plan minutes and
>>> gave
>>>> me extra minutes to get through the rest of the month. She sent me to
>>>> technical support, and we could not get my phone to make calls over my
>>> WiFi
>>>> network. Even though the phone says I am connected to WiFi. So, I went
>>> to
>>>> the T-Mobile corporate store in Fashion Square, and the manager (she has
>>> the
>>>> same phone) and I tried to connect to the mall WiFi, and we could
>>> connect to
>>>> the mall WiFi, but could not make WiFi calls. Same error - could not
>>> connect
>>>> to T-Mobile network. I then tried to make a WiFi call at Starbucks, and
>>> it
>>>> worked! It also worked at Barnes and Noble after I agreed to the free
>>>> Internet terms and services (didn't work before then).
>>>>
>>>> I googled for issues with WiFi calls with this phone, and found a lot of
>>>> them. Sometimes it works and sometimes it doesn't. The error message
>>> that
>>>> pops up says the phone cannot connect to the T-Mobile network. T-Mobile
>>> is
>>>> aware of the issue, but does not have a fix or ETA for one.
>>>>
>>>> One posting had this to say about the WiFi calling.....
>>>>
>>>> The WiFi Calling app is Kineto's WiFi Calling app branded for T-Mobile.
>>> The
>>>> WiFi Calling app is an implementation of 3GPP GAN, which allows
>>> something on
>>>> the Internet to get into a cellular network and do stuff (in this case,
>>> make
>>>> and receive calls).If you care to pull up the most recent version of the
>>>> spec, linked above, you'll find that "registering" (ie, logging into
>>> home
>>>> base) involves these steps (get a glass of warm milk and see 8.4.1.6)
>>> ...
>>>> 1) Performing a DNS query to get the address of thing it's trying to
>>> connect
>>>> to (if necessary)
>>>>
>>>> 2) Setting up an IPSec tunnel to thing resolved in step 1 (called a
>>> SEGW)
>>>> 3) Resolving and connecting to (using TCP over the tunnel setup in step
>>> 2)
>>>> yet another thing called a GANC
>>>>
>>>> 4) Sending the GANC a "register request", which includes your phone's
>>> IMSI,
>>>> information about the cell you're currently connected to, or last
>>> connected
>>>> to if no longer connected, and other stuff
>> This is a capacity and QoS issue on the other side. Get another app.
>>
>>
>>>> 5) Getting back a response that the GANC is happy with you and all is
>>> well
>>>> I started to think that perhaps I have a router issue on my network. I
>>> have
>>>> a Linksys WRT54G wireless access point going through a BEFSX-41 Linksys
>>>> router to my cable modem. I checked the routers, and IPsec is enabled
>>> for
>>>> both. The WRT54G uses MAC filter to allow only certain devices to
>>> connect,
>>>> and WPA Personal, AES algorithm, and a shared key of 64 characters in
>>> it.
>>>> The WRT54G says I am connected to the phone when I enable WiFi on the
>>> phone.
>>>> This is a long way to get to my question...thanks for staying with me.
>>> is
>>>> there a way to look at what the phone is doing when I try to enable WiFi
>>>> calling to see where it fails? A wireless sniffer?? Does any of the
>>> above
>>>> give you network gurus an idea of what may be wrong and if it could be
>>> in
>>>> issue with my router?
>>>>
>>>> Thanks for any help you can provide....I would hate to go back to a
>>>> Blackberry as I really like Android now!
>>>>
>>>> Mark
>>
>> --
>>
>> (503) 754-4452
>> (623) 688-3392
>>
>>
http://www.obnosis.com
>>
>>
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