Android TV FREE VOIP Phone - Android TV General

I want to setup a free VOIP phone with free phone number on my Android TV.
I would like to use internet connection to place calls with no SIM card and free service.
I know this is easy with a paid SIP service but I would like to do the free route please.
It should work well as it has a mic in the remote, just the same as a phone.
I have the Skyworth Leap S1 - same as the MyCool Box and others.
I see Google voice a free number but is limited and not truly free as I am outside US.
Please help with suggestions and links.

Related

VOIP For the Universal

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

X Series on 3 - Anyone Using it?

Anyone using x-series from 3 UK on their universal. If so what are the settings for the internet and how does skype work on 3 ? Do you just download Skype for Mobile?
Thanks
Hi Samsul,
As far as i know, Skype on x-series is a different proposition altogether from Skype for Windows Mobile. The two applications are different. Skype on x-series works over the GSM network so you can make and receive Skype calls anywhere in return for a small monthly fee to 3 (i think it's £5?). Skype for WM on the other hand works for free over WiFi (like the PC version) or over a 3G cellular connection if you have one (beware using it on 3G without an unlimited data plan though). You can download Skype for WM free directly from the Skype website.
I don't believe the x-series application would execute on the Universal as i imagine it was designed specifically for Symbian OS but i may be wrong. Let me know if you find otherwise
Hope that helps.
just added x series silver
I have just added x series silver to my 3 contract and using it to surf internet and skype on my XDA Exec without any problem.
You would have been able to do this before as 3 allows full access now, the thing to be careful of, is do the applications on the X Series use a special proxy to differentiate between the plan you have purchased, and full open internet access.
Be careful.
I was able to use Skype before 3 activated x series, but I wasn't able to browse the internet apart from mobile.three.co.uk.
Everytime I typed in a web address (ie news.bbc.co.uk), I used to get the message ' You can only use this service on a 3 handset' or something similar to this. Now all websites work fine.
Also, if I was being charged for data, would this show up on 'Amount Spend' section of My 3? Anyone know?
Thanks

Sip / Voip in USA????

Hey all,
I was trying to find some information on Sip protocol in the US. I have been playing around with the WM6 Roms and would like to try the internet calling feature. For the people in the US:
- what provider do you use?
- Is it a plan (like Vonage) or per call? I know I there is a french company Wengo.
Thanks in advance.
Try voipdiscount.
Gilko
Why - did you manage to get voipdiscount working with your trinity WM6?
What ROM - what wettings - tell tell!
VOIP in USA
Hi guys.
I´ve doing VOIP on pda´s for 2 years and this is what I´ve been using:
SJphone and credits from Voipcheap,voipbuster,Voipstunt,(I pay $12 or $13 every 3 months for unlimited calls to regular phones)this software is pretty easy to use and it has a nice phonebook.I´m attaching the software and the profile for Voipcheap which is the cheapest way for me to call my family in Spain and friends in Europe,there are many free destinations,if you go to those websites and compare the prices.
I believe there´s also a good deal with Skype and Voipcheap(you pay a fee and get unlimited phonecalls for a year)like I said go there and compare.
I know it would be nice if you can set up your phone and WM6 for VOIP with the software that comes with it.
The first file is the profile that you should copy and paste in the profile folder of the SJphone app once it´s installed.
I hope I could help you.If you need some help just let me know.
See ya.
HTC P3600 Black
-Opera.
-Sk Tools.
-SJ Phone.
-Tweaks2k2.NET.
-Skype.
-Resco Pocket Radio 1FM.com.
-WIFIFOFum.
-PocketRAR.
Thanks DTA1974. I am interested in seeing how this funtions on WM6.
Amazing little device the trinity is.
VOIP in US and Around the World
I agree with you, the VOIPCHEAP or VOIPBuster, or VOIPSTUNT is great, but you dont get a phone number...but here is the trick. Setup an account on one of these services and you dont have to pay anything to make US Calls mobile or landline. When you setup this account make sure your username is not so many characters (keep it within 8 characters) Then...Go to www.IPKALL.com and get a WAshington State number ..its free and when you get to the account, use the following:
SIP Number: Use your Account Sign In for VOIPBuster or whatever...(the 8 or less charater one)
SIP Address: sip.voipbuster.com or sip.voipcheap.com or sip.voipstunt.com (whichever you signed up for)
Email: Use your email address
Password: setup a 4 character password for logging into changing these settings... You will recieve an email with your new Number
Wait 60 min and then that number will be forwarded to your new SIP account!!! also if you wanna setup voipbuster on your Phone, just use config tool and use the same settings as above:
SIP Number: Use your Account Sign In for VOIPBuster or whatever...(the 8 or less charater one)
SIP Address: sip.voipbuster.com or sip.voipcheap.com or sip.voipstunt.com (whichever you signed up for)
It will work. I been using it for a long time.
I really want to use the integrated WM6 VoIP software. this way when I'm at home, the phone connectes to my Wifi and automatically the calls go throught VoIP. I know my settings are OK - as I managed to make one successful call. The rest of the time something is stopping sound coming to the speaker. I can be heard but cannot hear - completely dead. Strange thing - whenever I make a call, there is a long beep. There is SOMETHING cutting off the redirection of VoIP sound to my phone - perhaps the file from HTC which sets up the network settings for my phone network in France. Any ideas on how to solve this welcome. apart from that I have SJphone working, too, but not what I wanted. Thanks dta1974.
VOIP 4 FREE means FREE 0.00 <--<
Never ever ever pay. free means free. I have played around with voipbuster and and voipstunt both are stupid they let you call for free for awhile then cut you off and make you pay. The ipkall gives you a free inbound phone number for FREE all the time, if you sign up for another account on voipbuster then switch users on ipkall it starts working again both was in and out. all we need is one of you good script/program writters to write us a program that goes out and signs us up using another user account every day and also logs us into ipkall and updates the info to match the new user name and we will get everything for free all the time, that is until the bastards find out what we are doing. It will work so please write me one because until then I will have to manually create a new user each day. Oh unless someone knows of a FREE and I mean FREE SIP provider!!!

[ fring ] [ Skype, MSN, Google Talk, ICQ, SIP, Twitter, Yahoo and AIM ] [ All n One ]

fring™​
Is a mobile internet community and communication service that allows friends to connect, share experiences and enhance their online communities together.
Using your handset′s internet connection, you can interact with friends on all your favourite social networks including Skype®, MSN Messenger®, Google Talk™, ICQ, SIP, Twitter, Yahoo!™ and AIM®. You can listen to music with your Last.fm friends, check out what each other are up to on Facebook, receive alerts of new Google Mail™ and tailor make your very own fring by adding more cool experiences from fringAdd-ons™.
fring puts all your online friends into one, dynamic fringFriends™ buddy list, which is always connected so you can enjoy free calls and instant messaging with all your online friends, see their real-time status, and even find each other’s actual location.
fring makes your mobile the ultimate social device.
As well as it′s social appeal, fring also lets you make affordable local and international calls to landline and regular cellular numbers using your SkypeOut/SkypeIn account or almost any internet voice service (SIP) such as SIPNET, EuteliaVoIP, VoIPVoIP and VoIPTalk, even from non-SIP enabled handsets.
What′s more, fring does all the work for you, automatically logging you into your favorite WiFi hotspots so you save time and hassle without having to configure your WiFi access points each time.
As easy to download as a ringtone and simple to install and use, fring is PC-independent and does not require any dedicated hardware. All you need to use fring is a supported handset with internet connectivity and an internet data package or WiFi access.
fringsters and taking all of their internet communities mobile. More features will be added shortly.
I have created this thread and posted this app because I liked the most and wanted to share with all who might still not knowing about this app. You can also put your feedback here so that fring may hear you and may improve in future versions..........
Get more info here
Download :
EXE : Enjoy, Mirror.
Cab : Enjoy, Mirror.
Thanks for your feedbacks and testings..........
believers?nooo!!
just for the record>>>
Fring is realy a great app..BUT!!!!>>> nobody knows how it works outside of the good and stong network coveredge.
I talk about Dubai,and many other city like Dubai.My net is 24
24/7 and very expencive!BUT FRING GAVE ME NO SIGN OF FUNCTIONS>
At home in EU. works fine.If anybody knows whats wrong with 3G network,please share with me.HSDPA comes as well,BUT FRING DON T WORK!!!
well before some one tells me the wise idea to download the phone specific app,I KNOW IT!!my HTC jade is ok,and the app is good.Just don twork.
insane.I rather have msn and skype separately than having a program what occupies place and looks good,BUT DON T WORK!!
helios
What does fring wants me to register a fring account first to use all the other IMs?
BB88 said:
What does fring wants me to register a fring account first to use all the other IMs?
Click to expand...
Click to collapse
Ya, We should first regsiter fring account within the device ( One time ) to use all other IMs.
Its 100% free app..........
Thanks and regards
important and fantastic
Dear ALL!!
As our senior member wrote earlyer,it is a truly amazing app.
Besides my problem,(happen to me) the program is working in EU or other modern countrys.Dubai is back in time with 20years in the communication yet.
The fantastic thing in Fring is that you belive it or not>> you don t need a sim card in your phone to use it!!
I advise you gyus to look at the youtube or google for the Fring videos!!You can be pretty surprised with the outcome!
Well,you def. need a strong wifi connection.!!!With 3G I don t guarantee full satysfaction!
Don t forget the phone specific download.On the Fring site,you need to find your own download cab.!
happy Fring helios
when on site of fring, no support for htc touch hd? Which version should i take then?
mouki_9 said:
when on site of fring, no support for htc touch hd? Which version should i take then?
Click to expand...
Click to collapse
Download from my mirror or else select anyother htc devices ( i.e diamond ).
hmmm, just tried it, but it isn't very finger friendly... and no option to hide offline contacts....... it's got potential, but lacks user friendlyness
I just gave it another try too - and it still has the same annoying alert sound when receiving a chat msg! I can't find anyway to disable or change it other than muting my sound altogether with. If there was an option to change or disable the sound I might use it.
Skype or one of the others?
Thanks for the post.
So which is best and cheapest if I want to call
my folks thru fring to their cell phone, (but not smartphone): skype? Where can I find a comparison
of pros and cons between the different voice data internet systems? (I have a full data plan thru T-mobile, and use a Trinity wm5.)
green
is there a way to use fring with 3g WAP access?
in other words, for port 8080 only?
Screenshots?
Doesnt it work over GPRS? 3G? or WAP?... so it only works on wireless or while connected via activesync? O_O
starnge but happy
Heyyyahh All!
so many question about FRING.Why noone take a sneek wiev on youtube,or google,but the best is the Fring website.Planty answers,and even more pics films e.t.c are there.
When I met with this program first,I needed a free or at least cheap communication in Dubai!sorry FROM Dubai!Back to EU!
On 3G ,it works badly if you call your Mom!On wifi it needs a good signal.GPRS sometimes ok,but most of the week signals are just fine for chat!
The best option is to configure the SIP client.If you have voipbuster,it is easy!Check out the data on theyer website,and you can see what country is free to call?!!!!On the otherhand it is always free from computer 2 computer!!Or from Fring to another Fring user!
There is no cheaper tan FREE!!!!!
The annoying beep is there in the msg client.With the system sounds and noticication you can fine tune it.It is visible with HTC and some fresh Rom s !!
It is the IM client sounds in the notification setup.In the system setup tabell!
The connection is buffling stable on wifi,and it was specialy fantastic at the airports!!!Good to say helo I m alive for free!!The option to chat in the same time wit 6 different chat client is just great.
well: look at the website,and learn as I did.Find som wifi and Fring away!!!
helios
Checking it out
Thank Helios,
Good tips; will do. g
i have had this thing for a while.
at first they did not support bt headset, i don't know if it does now though. maybe they have updated it. I like it. definately recommend it,
BLOCKED in ETISALAT
heliosismagic said:
just for the record>>>
Fring is realy a great app..BUT!!!!>>> nobody knows how it works outside of the good and stong network coveredge.
I talk about Dubai,and many other city like Dubai.My net is 24
24/7 and very expencive!BUT FRING GAVE ME NO SIGN OF FUNCTIONS>
At home in EU. works fine.If anybody knows whats wrong with 3G network,please share with me.HSDPA comes as well,BUT FRING DON T WORK!!!
well before some one tells me the wise idea to download the phone specific app,I KNOW IT!!my HTC jade is ok,and the app is good.Just don twork.
insane.I rather have msn and skype separately than having a program what occupies place and looks good,BUT DON T WORK!!
helios
Click to expand...
Click to collapse
ETISALAT UAE has blocked the website or IP for www.fring.com, which is required to authenticate the device before using other IM.
ASh
fring on etisalat
Ahdeshpande!!
You right,but as u probably know,etisalat in UAE. is just another fu..ng stupid company,who belives in fate,and the kingdom of communication!!
Well there are a number of softwares what u can use to go on any website in the world.!
Not proxy servers,but others!
just a few>> ghost surf,hotspot shild,ultra surf...This is a small list of softwares,u can use during sign up on the Fring site!!
I do,and work fantastic.After the sign up procedure it will work on your phone!
It is truly a pain in the a.... how etisalat try to control the web.But u know,it is uncontrollable,and with one of the above mentioned software,u can browse anything!!ANYTHING!!!
P.S the ultrasurf programm is attached.It is a good start for invisible browsing!HAVE FUN
helios
etisalat the bastardo!!!!
Please don t forget>>>> the u94 program works only on explorer.Not on mozzilla!!
So u can open now the Fring with explorer.After u unzipped the program u94,and setup is ok,please give a few seconds for bild up the vpn connection.Don t let the automatic site to come and load fully.It is not important.A Padlock appears on the lower left corner on your desktop,if the MEDICINE is ready to use.U can use for many other sites.If u need some hard sites,it isn t the strongest encryption.So it doesn t work for all sites,but many!!
helios

[How to] Using VOIP + Encrypted VPN, just confirmed working in Belize

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.

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