In case anyone runs their own Asterisk PBX, the X-pro phone works well on the Universal. It states that it's only WM2003, but it seems to work fine. Call quality is pretty good considering it seems to only go through the speakerphone (at least I haven't found the setting to make it work phone-style).
Hi Nick
Which soft client are you using on the xda? Do you have a decent soft client that has g7323 or g729 support or are you using IAX or g711. I am developing some embedded Astrisk PBX's at the moment, at some point we wnat to add support for PDA's on our WiFI hotspot network but really dont want to waste all the bw needed by g711.
Most of the big name cleints have not yet develpoded a g723 or g729 client for any PPC. Some of our wifi deployments use satellite bw and at $6,ooo per month per MB g711 adds about 2c per minute to the costs.
regards
Charlie
Charlie VOIP said:
Hi Nick
Which soft client are you using on the xda? Do you have a decent soft client that has g7323 or g729 support or are you using IAX or g711. I am developing some embedded Astrisk PBX's at the moment, at some point we wnat to add support for PDA's on our WiFI hotspot network but really dont want to waste all the bw needed by g711.
Most of the big name cleints have not yet develpoded a g723 or g729 client for any PPC. Some of our wifi deployments use satellite bw and at $6,ooo per month per MB g711 adds about 2c per minute to the costs.
regards
Charlie
Click to expand...
Click to collapse
I'm using the one from xten http://www.xten.net/index.php?menu=PPC. Check the url for all the specs as I'm not fully aware of all the different protocols and their required bandwidth, but I think this one supports 711 and GSM. I can see that it would be important of such an expensive connection, but for most (myself included) I just find a hotspot, turn on wifi on the Jasjar, and away I go (this is when I'm travelling or calling long distance
Nick.[/url]
Charlie VOIP said:
Hi Nick
Which soft client are you using on the xda? Do you have a decent soft client that has g7323 or g729 support or are you using IAX or g711. I am developing some embedded Astrisk PBX's at the moment, at some point we wnat to add support for PDA's on our WiFI hotspot network but really dont want to waste all the bw needed by g711.
Most of the big name cleints have not yet develpoded a g723 or g729 client for any PPC. Some of our wifi deployments use satellite bw and at $6,ooo per month per MB g711 adds about 2c per minute to the costs.
regards
Charlie
Click to expand...
Click to collapse
IIRC, the xten (now CounterPath) PPC Softphone client supports G729 (I think it's a) only if ordered in quantities of 10,000 or more. Hah, I guess that's out for us lamers who just want to buy it to use SIP on our mobile devices.
The g729, however is available on eyebeam (called that because of the video capabilities available in the premium version 1.1) for Windows. If it makes you feel any better, they neglected to include the Mac users, as well, and so they don't have g729 support either.
I love g729 because I use it with Teliax and IConnectHere over dialup with excellent results. I am currently consulting in the Middle East and it saves me 70% or more on telephone charges.
using x-pro and asterisk
From what I understand it is possible to run X-pro on a Qtec9000 . I have some questions:
-what are the exact release of the software used (windows and x-pro)
-what are the settings used to make it work with asterisk and is it via stun server or with NAT traversal.
- is there a working iax client out there. The advantage is that it just needs one port to be open and that it is very easy to do nat traversal
Could you please paste the info and the settings to the forum. If I'm sure I can make the Qtec9000 work as a voip phone I will buy me one in short time.
I've given ppciax (http://www.voipalia.com/ppciax/index.php) a brief run on my XDA Exec, with reasonable sucess - not really used it, by the time I find an open hotspot, connect to it, and whatnot, it's usually a lot easier to just use my contract included minutes
Next time I ggo abroad I'll certainly be using it though.
Might give the xten clent a go as well, just to see which is easier (though I suspect using IAX the ppciax client will remain my voip softphone of choice, just for ease of compatabilty with random networks).
Re: using x-pro and asterisk
voop-fellow said:
From what I understand it is possible to run X-pro on a Qtec9000 . I have some questions:
-what are the exact release of the software used (windows and x-pro)
-what are the settings used to make it work with asterisk and is it via stun server or with NAT traversal.
- is there a working iax client out there. The advantage is that it just needs one port to be open and that it is very easy to do nat traversal
Could you please paste the info and the settings to the forum. If I'm sure I can make the Qtec9000 work as a voip phone I will buy me one in short time.
Click to expand...
Click to collapse
-Release 2.2 1106t build stamp 18462. It appears that once closed you will need to soft-reset to re-open. Works via NAT with or without stun.
HI Guys
I saw the x-ten 10,000 plus for g729 as well. Shame. But i am still looking and will let you know if i find one. I know that G723 and g729 work really well on 3g connection as i have a soft client on my lap top that works perfectly using a bluetooth connection to my Universal. When i make international calls ina coffe shop or something it is much cheaper, as the BW is less expensive than calling over the gsm connection. Just a shame you can only run g723 over the laptop and not over the universal directly.
regards
Charlie
If you want to use an IAX capable Softphone on your Pocket PC to connect to Asterisk or any VoIP Provider supporting IAX give "VoIPSurfer" a try...
Download available at:
http://www.voipsurfer.net/download/VSurferDemoInstall.zip
hth,
Tin
Related
Hi,
my new provider offers a GPRS flatrate and I wonder if there is a tool to make IP telephony (for international calls) possible.
Does anybody know a company which offers that kind of service for PPCs? Or is there a kind of workaround to use this service from XDAII via GPRS?
I've been using Net2phone and Webphone before, I think it is impossible to convert and run their access programs on PPC. So maybe there is a way?!
Thanks for any comments on that topic...
bobopopo
You may want to try MS Portrait and Skype which now has a PPC client.
Skype for PPC
Has anybody used skype and a SD Wifi Card?
Has anybody used skype and a SD Wifi Card?
I did i works PErfect i have a mda 2 and a scandisk sd wifi card
perfect only no video
You can use Net2Phone and other VOIP services on the Pocket PC...simply download either X Lite, X Pro or SJPhone and set them up to use the Net2Phone servers. Or you could just download the already-set FWD Pocket PC client from www.fwd.pulver.com. Voice quality over GPRS may not be all that good though...
There is a PPC version of XTen's VoIP client (the probably best VoIP software client), but it costs $50 for the newest version (X-Pro). see: http://www.xten.com/index.php?menu=products&smenu=xpro
But it seems like speech quality is problematical on the imate devices. see: http://support.xten.net/viewforum.php?f=7
What I was able to find was this previous version of X-Lite, which seems to be free: http://www.pocketgear.com/software_detail.asp?id=8886
According to a reply to an email I sent to Xten Networks, you can download a trial version of X-Pro's Pocket PC edition from their site. The *.cab can be downloaded straight to your XDA from the following site:
http://builds.xten.net/download/?8cc389c2722bfa6f7dbb62de512cd930
Alternatively, you can download the *.exe file to your PC and then install it to your XDA. It can be found at:
http://builds.xten.net/download/?0c14043762718fd7b11deb85e7b6a0f8.
The user's guide is available at:
http://xten.com/docs/X-PRO_PocketPC_Users_Guide.pdf
Hope this helps
I'd love to hear otherwise, but I don't think this could work at all. VoIP requires a consistent 17k data transfer with little loss and low latency (under 225ms). All my testing points to about 1000-1400ms latency and heavy packet loss, often greater than 50%. This is part of the design of GPRS; using "spare" data space so that the voice calls are always clear.
Hello all Ive just ordered my universal on Orange, for delivery tomorrow, they are giving it to me for free on upgrade.
So now because I often use over my monthly minute allowance and having a few friends around the world I would like to use a VOIP service.
The only one I know of is Skype, as I am fairly new to this type of thing. So can anyone recommed a service that is cheap, easy to use, Universal compatible.
As for call costs I would like a service that is fairly cheap to call both landlines and mobiles. The mobiles would only really be in the UK, if that matters.
Any help is really appreciated. Many Thanks
Hi,
I expect you've seen my post elsewhere asking about voip clients for the Universal. I've lived and breathed voip for the last three months at work so I know something about it...there seems to be three basic kinds of voip services:
1) wholly proprietory services - closed source client and protocols. Skype is the perfect example. Will let 'real' phone users dial you (they call that 'Skype in') on a real phone number, and will let you call 'real' phones (they call that 'Skype out') for a fee. For Skype, there's a client for the Universal (I think, I don't own one yet). Other services - you're probably out of luck.
2) semi-proprietory services - perhaps providing their own client software, but built on open protocols (usually SIP, session initiation protocol), so you get an enhanced experience with their client. Often the client is locked to only talk to their servers. Examples would be Gizmo or Wengo. Could be an option for a Universal user if you find one that works with other clients than their own, AND if there's a generic SIP client that works on WM5 - and according to my thread, Xten's PPC client works ok.
3) standards-based services - client-agnostic, built on open-protocols (again usually SIP). They give you a username and server details, you enter them into your client - be it a PC-based softphone, a pocketpc application, or a piece of hardware such as an ATA (analogue telephone adaptor - let's you plug a physical phone, even a cordless one, into your home network and use it to make VOIP calls).
There's a fair few voip services like this nowadays, either companies who 'only' do that, or voip services as addons to a traditional ISP service - that's the case with my company, PlusNet, which offers a voip service to our broadband customers. You get sip to sip calls free, a free 0845 number to receive calls on, and you can choose from three different ways to pay for outbound calls - either PAYG (buy credit in £5 blocks, use it up as you make calls) or subscription ('Anytime' or 'Evenings and Weekends' - pay a monthly subscription and get a block of minutes to use peak or off-peak respectively). Sorry to sound like I'm advertising, it's just corporate pride - have a look at http://www.plus.net/plustalk to see more.
Hope this is a useful primer for you!
cheers
Matt S
(firmly OFF-DUTY PlusNet employee ;-)
that was discussed today - here: http://forum.xda-developers.com/viewtopic.php?t=31799&highlight=
see my answer:
i am using X-Pro Softphone for Pocket PC on my MDA pro (t-mobile universal version), it works perfectly with my german voip-account. you can use four different voip-accounts in this tool! currently i am using the version 3 pro. the only mismatch you will have (as with skype too): it only uses the external speaker instead of the phone speaker. but if you use your headset (you should anyway because of the weight of the universal;-)) it works the way it should!
details are here: http://www.xten.com
any questions left? feel free to ask!
cheers, lutz
Where did you manage to get version 3? - On the website you mentioned below I can only find 2.2 to buy for around 30 USD...
lutzh said:
that was discussed today - here: http://forum.xda-developers.com/viewtopic.php?t=31799&highlight=
see my answer:
i am using X-Pro Softphone for Pocket PC on my MDA pro (t-mobile universal version), it works perfectly with my german voip-account. you can use four different voip-accounts in this tool! currently i am using the version 3 pro. the only mismatch you will have (as with skype too): it only uses the external speaker instead of the phone speaker. but if you use your headset (you should anyway because of the weight of the universal;-)) it works the way it should!
details are here: http://www.xten.com
any questions left? feel free to ask!
cheers, lutz
Click to expand...
Click to collapse
what if you use a BT headset like the JABRA? will the sound be routed to the the BT headset or to the external speaker?
matzie said:
Hi,
I expect you've seen my post elsewhere asking about voip clients for the Universal. I've lived and breathed voip for the last three months at work so I know something about it...there seems to be three basic kinds of voip services:
1) wholly proprietory services - closed source client and protocols. Skype is the perfect example. Will let 'real' phone users dial you (they call that 'Skype in') on a real phone number, and will let you call 'real' phones (they call that 'Skype out') for a fee. For Skype, there's a client for the Universal (I think, I don't own one yet). Other services - you're probably out of luck.
2) semi-proprietory services - perhaps providing their own client software, but built on open protocols (usually SIP, session initiation protocol), so you get an enhanced experience with their client. Often the client is locked to only talk to their servers. Examples would be Gizmo or Wengo. Could be an option for a Universal user if you find one that works with other clients than their own, AND if there's a generic SIP client that works on WM5 - and according to my thread, Xten's PPC client works ok.
3) standards-based services - client-agnostic, built on open-protocols (again usually SIP). They give you a username and server details, you enter them into your client - be it a PC-based softphone, a pocketpc application, or a piece of hardware such as an ATA (analogue telephone adaptor - let's you plug a physical phone, even a cordless one, into your home network and use it to make VOIP calls).
There's a fair few voip services like this nowadays, either companies who 'only' do that, or voip services as addons to a traditional ISP service - that's the case with my company, PlusNet, which offers a voip service to our broadband customers. You get sip to sip calls free, a free 0845 number to receive calls on, and you can choose from three different ways to pay for outbound calls - either PAYG (buy credit in £5 blocks, use it up as you make calls) or subscription ('Anytime' or 'Evenings and Weekends' - pay a monthly subscription and get a block of minutes to use peak or off-peak respectively). Sorry to sound like I'm advertising, it's just corporate pride - have a look at http://www.plus.net/plustalk to see more.
Hope this is a useful primer for you!
cheers
Matt S
(firmly OFF-DUTY PlusNet employee ;-)
Click to expand...
Click to collapse
I use plusnet and love it and use the voip sevice to call landlines (free) from my laptop but I would love to know how to use my vario to do it. I presume I would do it via wifi through the broadband but dont know how. Please tell me if you can - thanks. I do have unlimited gprs but I would assume that I couldnt use plusnet this way as it is not broadband etc.
I'm using SJPhone!
It's for free
http://www.sjlabs.com/sjp.html
Hi, im using woize it is sip program sip = internet telefon.. woize works grate on 9100 if u ar on w-lan, it has 1 bug but is going to be fixst in ner fjutjer http://www.woize.com http://www.woize.com/smartphone.php
Known bugs
There is a problem with the volume on devices with a built-in GSM phone. The application will work but the volume is very loud.
Woize - a SIP based VoIP app now available for MS Smartphone : SmartphoneWoize Beta available now
January 25, 2006 [MS Smartphone]
Contrary to Skype, that is based on proprietary P2P technology (similar to the one in former Napster P2P), Woize is based on de facto industry standard in VoIP (Voice over IP) industry - the SIP.
Interestingly processors of speed 200 MHz that are in all smartphones and some slow Pocket PC devices, can handle SIP well, although they have problems or can't handle Skype at all. Since nowadays more and more MS Smartphone (the small brother of Pocket PC in Windows Mobile family) phones have built-in Wi-Fi, this SIP based Woize program may be a blessing...
Woize is digital telephony made simple. When signing up, you receive your own phone number that can be used from any computer anywhere in the world to call your friends and business partners at incredibly low rates. And they can call you - right to your computer!
SmartphoneWoize allows you to use Woize wherever your phone is connected to a WiFi network. The functionality of the application is similar to the PC and Pocket PC versions of Woize. Get SmartphoneWoize now and start calling other Woize, PocketWoize and SmartphoneWoize users for free!
Similarly like it is in Skype: Internet to Internet voice calls are free and calls to regular phone numbers are available at special rates (not free).
If you have a Pocket PC phone with slow processor (like HTC Wizard or HTC Prophet) you may consider using Woize too - there is a version for Pocket PC available too. Since these slow Pocket PC phones have problems to handle Skype voice calls, Woize may be the solution for you. Pocket PC version of Woize is here.
copy from msmobiles
more info
http://msmobiles.com/news.php/4839.html
Sounds good and looks nice. Have you used it ok KinkyGolab?
V
yess, the onley problem is the bug and it is the onley problem i haw found. u can also send sms from it and i get free sip telefon nummber and if u haw sip box att home u can setup so u can get
ur woize cal to ur SIP/ATA box in sted if ur pda is turn of
im going to get my Qtek 9000 to day so i can test woize on it but im going to test it tomorow
Settings
SIP Server: sip.woize.com
Outbound Proxy: sip.woize.com
SIP User ID: SIP-Username
Password: SIP-Password
For more detailed instructions for your SIP/ATA box please refer to your SIP/ATA box manufactures manual/guides on how configure your box.
vijay555 said:
Sounds good and looks nice. Have you used it ok KinkyGolab?
V
Click to expand...
Click to collapse
In fact, Woize is NOT SIP based. The client uses proprietary protocol and Woize has SIP gateway (not too different from Skype). SJLabs, XTEN and Cicero are SIP based clients that do not tie you into a service like Voize, Skype, MSN, Yahoo and AOL do.
All interesting. If the performance is good, and if it is SIP compatible, do we need to worry Finn?
I never use SIP - I'm always much closer to a phone then wifi, but it's good to know in case I'm planning any acts of insurgency :shock:
V
I think is not possible send SMS to any number... only SIP numbers!
Is Not?
KinkyGolab said:
Hi, im using woize it is sip program sip = internet telefon.. woize works grate on 9100 if u ar on w-lan, it has 1 bug but is going to be fixst in ner fjutjer http://www.woize.com http://www.woize.com/smartphone.php
Known bugs
There is a problem with the volume on devices with a built-in GSM phone. The application will work but the volume is very loud.
Woize - a SIP based VoIP app now available for MS Smartphone : SmartphoneWoize Beta available now
January 25, 2006 [MS Smartphone]
Contrary to Skype, that is based on proprietary P2P technology (similar to the one in former Napster P2P), Woize is based on de facto industry standard in VoIP (Voice over IP) industry - the SIP.
Interestingly processors of speed 200 MHz that are in all smartphones and some slow Pocket PC devices, can handle SIP well, although they have problems or can't handle Skype at all. Since nowadays more and more MS Smartphone (the small brother of Pocket PC in Windows Mobile family) phones have built-in Wi-Fi, this SIP based Woize program may be a blessing...
Woize is digital telephony made simple. When signing up, you receive your own phone number that can be used from any computer anywhere in the world to call your friends and business partners at incredibly low rates. And they can call you - right to your computer!
SmartphoneWoize allows you to use Woize wherever your phone is connected to a WiFi network. The functionality of the application is similar to the PC and Pocket PC versions of Woize. Get SmartphoneWoize now and start calling other Woize, PocketWoize and SmartphoneWoize users for free!
Similarly like it is in Skype: Internet to Internet voice calls are free and calls to regular phone numbers are available at special rates (not free).
If you have a Pocket PC phone with slow processor (like HTC Wizard or HTC Prophet) you may consider using Woize too - there is a version for Pocket PC available too. Since these slow Pocket PC phones have problems to handle Skype voice calls, Woize may be the solution for you. Pocket PC version of Woize is here.
copy from msmobiles
more info
http://msmobiles.com/news.php/4839.html
Click to expand...
Click to collapse
nice, thanks for pointing it out!
My first post in this outstanding forum
I've spent quite some time looking for programs able to run my SIP VoIP desktop client on Tynt. On WinXP I use X-Lite with VoIPDiscount and I know for sure it's possible to configure X-Lite with many other SIP based services like VoIP Stunt.
Is there a tested client for Tynt? All I've found was for PPC2003 and I got errors all over. Ideal'd be a client working with both UMTS and WiFi, but WiFi would suffice completely.
On the other hand, Skype works flowlessly
I use SJPhone:
http://www.sjphone.org/preview/ce/
You need to adjust settings to make it work correctly, also audio is a lot better with the USB headset, see this thread for right settings:
http://forum.xda-developers.com/viewtopic.php?t=59131
You can also use x-lite CE 1.01, find it here:
http://forum.xda-developers.com/viewtopic.php?t=58154
SJPhone all the way here too. It also works as a Vonage Softphone!
thanks guys. I saw SJphone but somehow I didn't manage access to the beta page.
I'll let you know
If your provider supports IAX protocol (which is much better while on hostile firewalled networks) my choice is http://www.voipsurfer.net/
My sincere thanks, guys I'm gonna try them all. At this point I created correctly the profile with SJPhone; the same profile works great with the windows client (after creating the profile I copied it to my desktop and the XP client accepted the profile like it was its own). After applying the profile the PDA client asks for id & pw, but I cannot register. Explorer is online so I know the internet connection is fine. I think I need some working yet.
I have managed to instal the pocketpc version of xlite and it works ok from the point of view of me trying to ring my home phone, it connecting and disconnecting ok and it registering as a broadband phone call through my isp when I check my online records.
The sound quality on the device is unusable.
When I use the supplied mini usb headphones I can hear the person I am calling very clearly but they can not hear me properly.
Can someone talk me through anything I can do to improve the settings so that I have a chance of using my device for voip calls whilst at home. I am not in the realms of anything to techincal though.
I'd like to save everyone the trouble of figuring out how to get this done by sharing my setup with you. The VOIP itself works great over 3G/4G and Wifi, but to use the VPN you'll need to be on Wifi, 3g VPN doesn't seem to work.
Requirements:
SipDroid app in the market
A free account at pbxes.org
A paid account at callcentric.com (~$.019 a minute to call anywhere in the US)
A paid account at SuperVPN.net ($4 /mo if you pay for the whole year)
First set up a pbxes.org account, and connect to it with the SipDroid app, I recommend using this guide to walk you through the process.
http://guardianproject.info/2010/05...e-mobile-phone-system-for-android-and-beyond/
Once you have that working there is one crucial adjustment to be made within SipDroid. For some reason it comes default with all sorts of audio codecs, but only ONE of them seemed to work on the EVO, the Speex codec. So go into audio codecs and switch everything but speex to "never".
After that you should have a working VOIP system but you'll still need some kind of trunk if you want to make outgoing calls to land lines or cell phones. There are many solutions for this but I recommend callcentric.com, they seem to be the most recommended for this type of setup, and they worked great for me. You can pay $20 a month for unlimited US calling, this means you can be anywhere in the world and call the US for just $20 a month. Or you can prepay (this is what I did), then you pay a flat rate of about $.019 a minute to call the US from anywhere, and if you reach you pre paid limit, it just cuts off until you recharge it.
Once you have your callcentric account purchased, just go into your pbxes.org admin area and under trunks add one for call centric, use your callcentric # as the username, and callcentric.com as the sip server. Then go under Outbound routing, add a new one, name it whatever and choose your callcentric trunk from the pulldown menu, submit the changes and you're done.
Now you should be able to successfully make outbound calls to anywhere using SipDroid.
Lastly, this was the most challenging for me, the VPN. Apparently android, including 2.2, has some major issues with maintaining vpn connections, especially when you try and use them for VOIP. There is a huge issue queue in the android google groups forum where the problem is openly discussed without a real solution. BUT, while it appears the majority of VPN connections will fail, they CAN work if you get it set up just right. Setting up VPN's, specifically VPN's tailored for mobile devices, is not something I know how to do. In the android group thread someone mentioned SuperVPN.net as a working solution, I checked it out and sure enough they work great, I had zero problems with them the whole time I was out of the country.
So create a supervpn.net account, and then on your phone go into Menu -> Wireless & Networks -> VPN -> Add VPN -> Add PPTP VPN, create the connection and you are good to go.
*I didn't set up an inbound call # with callcentric as I didn't need one, I assume after you upgrade your callcentric account, adding the inbound trunk is similar to the outbound. Be sure and look into getting a free inbound number from sipgate.com before you go and pay for one, you'll be locked to a California area code, but free is free.
An alternative I use is having an Asterisk server at home and use IAXAgent from the market. IAX does not have the problems that SIP does when going over NAT. I can make calls over 3G or wifi. A lot of SIP providers also provide IAX accounts. IAX is just a better way to go for making calls over the Internet. SIP is excellent for the LAN.
ChrisDos said:
An alternative I use is having an Asterisk server at home and use IAXAgent from the market. IAX does not have the problems that SIP does when going over NAT. I can make calls over 3G or wifi. A lot of SIP providers also provide IAX accounts. IAX is just a better way to go for making calls over the Internet. SIP is excellent for the LAN.
Click to expand...
Click to collapse
Oops.. the method I posted actually works on 3g and 4g also, it's only the VPN that requires Wifi, I had worded it incorrectly, now it's fixed. (thank you)
I looked into setting up an asterisk server, but I didn't want to have to depend on my own server or home connection being available whenever I needed it, especially when I was traveling for more than a week.
Is IAX the same as a trunk, does it cost anything to connect to land lines or cellphones?
True, you method does make SIP work because you are using a VPN. IAX is an alternative to SIP. It is NAT friendly, and as long as the port is not blocked, it just works. Though, there are a fewer choices for clients compared to SIP. IAX was created by the Asterisk team. I do not know of any VOIP systems that support IAX, bug that does not mean they dont exist. I am a heavy Astersk guy, so IAX was my cup of tea.
What advantages does this have over google voice?
I'm curious cause i'll be going to england soon and would be nice to make calls over wifi.
ShoxV said:
What advantages does this have over google voice?
I'm curious cause i'll be going to england soon and would be nice to make calls over wifi.
Click to expand...
Click to collapse
None, in fact, it his disadvantages (See below). Also, most businesses, schools, etc. will block just about every VPN method. OpenVPN is the most flexible one I have found, which might be able to sneak around by using alternate sub-1000 ports (which most places won't block, since they require root access on whatever server they're running from).
OP: Might wanna take a look at this...
http://www.mywot.com/en/scorecard/supervpn.net
drmacinyasha said:
None, in fact, it his disadvantages (See below). Also, most businesses, schools, etc. will block just about every VPN method. OpenVPN is the most flexible one I have found, which might be able to sneak around by using alternate sub-1000 ports (which most places won't block, since they require root access on whatever server they're running from).
OP: Might wanna take a look at this...
http://www.mywot.com/en/scorecard/supervpn.net
Click to expand...
Click to collapse
Not sure what you're talking about, it saved me hundreds of dollars in roaming minutes while I was in Belize. Some places do block vpns I'm sure but I never had any issues, but you don't need the vpn itself unless you're in a country that blocks voip altogether, at which point occasional vpn is greater than no vpn.
Also supervpn was the only method I found that actually works on android, I think the risks referenced in that link you posted really only apply to desktop vpn use, not phones. Openvpn is great for somewhat advanced users and if you have a computer you can depend on as a server while you're out of the country for days or weeks, this guide isn't meant for someone capable of managing that.
As for Google voice, it just initiates an inbound call to your actual cell number, which does zero good when you're trying to avoid roaming. Now the new gmail implementation of voice shows promise as an actual voip solution, but currently that version is desktop only from what I can tell.