WiFi-Calling (sim carrier) - Xiaomi Redmi 3s Questions & Answers

Anyone know how to get this working or if any ROM's support wi-fi carrier calling when SIM has no reception but connected to WiFi internet. My SIM and carrier support it used to work on Samsung s7 edge unbranded.
https://android.googlesource.com/
This talks about source code for it but is a little beyond me to implement.
Any ideas?
Thanks

Related

Simultaneous Voice Call and Data

I have the international Exynos version of the S7 Edge and find cellular data stops working as soon as the phone gets on a voice call. The H+ symbol disappears, browsing stops working etc. At home it is not a problem as the phone is connected to Wifi and voice calls don't effect it, however, out and about, when on cellular data, internet is all lost.
Is it that the s7 doesn't allow simultaenous voice+Data?. I thought that was a problem with Verizon only, GSM (AT&T etc) versions don't have that problem?.
Riz
Have the same version and same issue. Heard that it's not possible to do voice and data together...Not sure how true it is
Got tmobile in the usa.
I have always been able to talk and use the net at the same time.
I do it all the time. Seems like no one knows how to looks stuff up so they always call me.
This worms for me on network 4g and wifi
I have the same problem on my g935f unlocked in europe, so I can confirm it's not an American company issue. I'm regularly using my phone as a hotspot for my ipad and whenever I get a phone call the H+ turns into G (2g) and Internet stops working.
Same here. It was like that since my first Galaxy S, it's a technical limitation of network protocols. At least in Europe.
Sended from my Samsung Galaxy S7 Edge Gold Platinum
Hang on lets rewind.
Are you in the UK.
The 4G network here in the UK is getting there, But its still got along way to come.
One of them is the ability to pass Calls via 4G.
The problem you have in the UK is 4G is data, While H+ etc is for GSM
The UK have not bought the ability to do both yet.
What should happen, is you will be kicked of the 4G network to take the call, Then be re-connected when you finish the call.
This is not device specific, Its Network Region Specific
dave7802 said:
Hang on lets rewind.
Are you in the UK.
The 4G network here in the UK is getting there, But its still got along way to come.
One of them is the ability to pass Calls via 4G.
The problem you have in the UK is 4G is data, While H+ etc is for GSM
The UK have not bought the ability to do both yet.
What should happen, is you will be kicked of the 4G network to take the call, Then be re-connected when you finish the call.
This is not device specific, Its Network Region Specific
Click to expand...
Click to collapse
In Italy too, and here happen the same thing in 2G too.
Sended from my Samsung Galaxy S7 Edge Gold Platinum
The S7E supports VoLTE. It's working on my device. But your carrier has to have it as a service.
Otherwise, you should still have 3G when making a call. If you don't, that doesn't seem right.
VoLTE
In order to make calls and use data at the same time mobile phone networks need to either ...
support VoLTE (Voice over LTE) on the network (Three in the UK is currently rolling this out).
or provide phones with dual antennas, one for voice and one for data (I believe some US networks do this).
the_scotsman said:
The S7E supports VoLTE. It's working on my device. But your carrier has to have it as a service.
Otherwise, you should still have 3G when making a call. If you don't, that doesn't seem right.
Click to expand...
Click to collapse
No 3G, that's the way normal LTE does works. Just like 2G, because if you make a call under 2G, data connection will be turn off.
Sended from my Samsung Galaxy S7 Edge Gold Platinum
Basically it goes down to network support. I never have such problem with 3 UK but work Note 4 on Vodafone sometimes disables data when in call. Sometimes doesn't. Which leads me to believe that it's not just network but also particular towers.
Sent from my SM-G935F using Tapatalk
Quick question about VoLTE: Has anyone tested if VoLTE works on the international version (SM-G935F) on AT&T?
cabreca said:
Quick question about VoLTE: Has anyone tested if VoLTE works on the international version (SM-G935F) on AT&T?
Click to expand...
Click to collapse
I can only tell you that international version supports VoLTE, wherever it'll work on AT&T I don't know.
Sent from my SM-G935F using Tapatalk
Each VoLTE network requires a special firmware. There is no AT&T firmware for international s7 edge (still, it might be custom roms supporting this).
I'm in Europe and with international s7 edge I can use voice and H+ data connection at the same time.

Will S7 Edge SM-G9350 Dual Sim work fully on AT&T?

I bought an S7 Edge SM-G9350 Dual Sim that is unlocked. I was planning on using it on AT&T but apparently the Dual Sim model isn't compatible with the 4G LTE in the US. The AT&T rep I worked with called his Samsung rep and verified it wouldn't work on 4G. We checked all the APN settings and bands the device is capable of, verifying it should work. Is there any way to make it work correctly as it seems to be a software issue?
I spoke with another AT&T rep who said it doesn't appear to have the region lock as it wouldn't activate on the AT&T network at all then but he didn't know why it wouldn't work. From the article I read the region lock is separate from the network lock. The region lock is removed if a phone call of 5 min is made in the area the phone is from. Then the region lock is deactivated. Here is the article I found. www . androidcentral.com/your-unlocked-euro-galaxy-s7-still-region-locked-thats-not-huge-deal
Would flashing another ROM work, or what level is the incompatibility? In the network settings there are listings for the carriers and their 2G and 3G settings but nothing else.
Apparently this thread double posted so this one can be deleted by a Mod
really... i'm calling BS on the reps... what is your definition of "working fully"? i have a dual sim G935FD and LTE works just fine on AT&T. the international version is missing 2 bands (29 and 30?), that's used in certain areas. other than that, i personally have not had any issues/ have you tried using an AT&T sim to confirm the phone won't work, use LTE? see below as well (WillMyPhoneWork.net):

Dual SIM G950FD on US T-Mobile and AT&T

Has anybody tried the G950FD on T-Mobile and AT&T in the US? Ideally Tmo on SIM1 and ATT on sim2.
I know the S7 couldn't switch well between the two networks as a dual sim phone.
Also is WiFi calling working? B12? Is SIM2 3G on AT&T or still just 2G?
Thanks!
Sent from my ASUS_Z00A using Tapatalk
I've done some more searching so let me clean this up for future searchers...
Q1. At&t will not work well on SIM2 since they killed their 2g network. There does seem to be a 3g antenna in SIM2, but for some reason still requires a 2G network. Tmo works fine in SIM2.
2) Tmo WiFi calling is not working. Though there is hope that this will work in the future (with root). Not much hope for a native solution.
3). Volte (b12) does seem to work with certain country modems. But as of today, its not clear which countries.
Sent from my ASUS_Z00A using Tapatalk
filterxg said:
I've done some more searching so let me clean this up for future searchers...
Q1. At&t will not work well on SIM2 since they killed their 2g network. There does seem to be a 3g antenna in SIM2, but for some reason still requires a 2G network. Tmo works fine in SIM2.
2) Tmo WiFi calling is not working. Though there is hope that this will work in the future (with root). Not much hope for a native solution.
3). Volte (b12) does seem to work with certain country modems. But as of today, its not clear which countries.
Click to expand...
Click to collapse
thanks for info
I have international S8 SM-G950F.
Recently, I switched to Ultra Mobile and contacted them about using VOLTE because they advertised it.
Ultra Mobile is a MVNO of T-Mobile. The reason I contacted them is because you need to have a SIM that is provisioned for WiFi Calling before it will work. I tested this by going into Connections, then Data Usage, and finally Mobile data. (Turn switch off and then try using the phone or sending MMS. Mine worked. But remember I contacted the carrier after they advertised that they have WiFi Calling....

Wifi calling on freedom mobile

Recently I got an S8 and I ported over my number to freedom from fido.
I thought the wifi is available on S8 but it is not.
Does anyone know when wifi calling would be available for S8?
The S8 supports VoLTE and WiFi calling, however it's upto the Carrier to enable the feature. I'm on Rogers, with my S8 I have WiFi calling and VoLTE working. However people who have unlocked S8's on Rogers won't get WiFi calling or VoLTE because Rogers blocks it on phones not purchased directly from Rogers.
Actually Rogers does not block any phone that it is not purchased from roger's itself.
I have been with Fido for 12 years and last year I got a brand new S7 edge from the Samsung store in Sherway Gardens.
The VoLTE and Wifi calling worked out of the box.
I called Fido and I wanted to make sure to register my new IMEI and the woman on the phone told me that the IMEI is automatically registered after few days
but just in any case she did regestered it.
I kept my Fido for few days before I port my number to Freedom and the S8 I got from Freedom worked in Fido (I unlocked it)
and the VoLTE and the wifi calling. Although what I did was to change the CSC. Then I changed the CSC back to Freedom and I did
not have the option for the wifi calling.
What I have noticed is that the phones that are sold in Canada (At least the major models ) are the same and the only difference is the CSC (network customization)
code that are come preloaded.
Now Freedom is a new to VoLTE and Wifi calling so I am waiting to enable the wifi calling in S8
gp-se said:
The S8 supports VoLTE and WiFi calling, however it's upto the Carrier to enable the feature. I'm on Rogers, with my S8 I have WiFi calling and VoLTE working. However people who have unlocked S8's on Rogers won't get WiFi calling or VoLTE because Rogers blocks it on phones not purchased directly from Rogers.
Click to expand...
Click to collapse
check this thread, Rogers will not support VoLTE and WiFi calling on phones NOT purchased directly from Rogers:
http://communityforums.rogers.com/t...-Phones-Not-Bought-in-Their-Store/td-p/397684
I don't know what the thread says but I can tell you that I have been with Fido for 12 years and last year I bought from Samsung Store a S7 and after few months an S7 edge
and on both phones VoLTE and wifi calling was working just fine.
I never had a single problem.
Also I called Fido representative and confirmed that both services were configured on my account with a problem
Also few days ago when I got my S8 from Freedom (I sim unlocked it) I put it on my Fido sim card
and VoLTE and Wifi were working again just fine
gp-se said:
check this thread, Rogers will not support VoLTE and WiFi calling on phones NOT purchased directly from Rogers:
http://communityforums.rogers.com/t...-Phones-Not-Bought-in-Their-Store/td-p/397684
Click to expand...
Click to collapse

T-Mobile wifi calling possible on unlocked S7 Edge (SM-G935U)?

I have an unlocked Galaxy S7 Edge (SM-G935U). My carrier is Total Wireless (Verizon MVNO). I recently got a new office at work, and the Verizon coverage in this part of the building is terrible. I use wifi for data but cellular calling basically doesn't work at all.
I've been looking at other networks, and I'm leaning toward T-Mobile or MetroPCS, one of the reasons being they have wifi calling and the wifi at my office is plenty fast. I checked in settings to see the wifi calling option, but when I go to settings > connections > more connection settings, which is where the wifi calling setting is supposed to be, there's nothing about wifi calling.
I had a thought that maybe the wifi calling option isn't there because my current carrier doesn't support wifi calling, so I contacted Samsung support. I asked if I get a SIM from a carrier that supports wifi calling, would the wifi calling option be enabled. They said that unlocked phones don't support wifi calling at all.
This confuses me, because this thread mentions some people were able to use T-Mobile wifi calling on an unlocked S7/S7Edge. But that thread is older, so maybe for some reason wifi calling was removed from the unlocked S7 Edge with the Nougat update?
I suppose the only way to find out for sure is to get a T-Mobile or MetroPCS SIM and see what happens. But is anyone able to shed some light on if this is even worth trying? I suppose it's also worth trying out just to see if regular cellular calling on T-Mobile might be fine at my new desk, but hopefully there's some way to do wifi calling.
Unfortunately I think you need the sm-g935f to get t mobile wifi calling. Don't think it was ever achieved on the U models
I had an s7 edge from T-Mobile (SM-G935T) but I flashed the unlocked firmware essentially making it a SM-G935U and I had VoLTE and Wifi calling working with no issues. It was about a month ago, so it was on Nougat. I would expect no issues with an actual SM-G935U on T-Mobile.
Well, I answered my own question. I switched over to the T-Mobile 10 GB $50/month prepaid plan and when I changed SIMs the phone gave me a "reconfiguring your device for new SIM card" message. Wifi calling is now active.
Also, this is a list of phones that support T-Mobile wifi calling. I probably should've checked here first.
http://www.spectrumgateway.com/compatible-phones

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