Related
I noticed there isn't an option like on the HTC devices that let you choose WIFI ONLY or MOBILE + WIFI. It appears they took that out completely on the Samsung Roms? Is there anyway to disable DATA all the time? I'm in a wifi access point 24/7 literally. Sorry folks, only thing im curious about.
I would like to know also. None of the apps I have tried have worked yet.
Sent from my SAMSUNG-SGH-I897 using XDA App
Did you try to remove AT&T APN in Settings? It will not be able to connect to 3G without APN.
If you do not want to lose your APN nsettings, create new one, dummy, without any real data inside, and make it default one. Same results.
Another thought, if you have your Wi-Fi turned on all the time, your 3G connection should be switched down automatically. At least it works like this on N1. I am just thinking of bying Captivate, if it will have good custom ROM with Froyo, not taking it with all AT&T bloatware on board and Android 2.1
in the market check out the apps APNdroid and quick settings. Both have toggles for data connection
You can also put it in airplane mode and them just turn wifi on.
Sent from my SAMSUNG-SGH-I897 using XDA App
tonysunshine said:
in the market check out the apps APNdroid and quick settings. Both have toggles for data connection
Click to expand...
Click to collapse
Thanks dude I picked that up works Great on Captivate. I'd rather use something like that than enabling wifi 24/7 to eat more battery etc.
I've tried downloading a number of free apps (including APNdroid) to turn off mobile data on my Captivate, but none of them seems to work. All the widgets give the impression that it is off, but I can still open the browser and navigate to websites. Am I doing something wrong, or is it just not possible to fully disable mobile data access on a Captivate?
Yeah you're right
@alobotnad
Hey you're right, APNdroid does nothing it doesn't even shut down the 3G icon on my device now and yes it still connects either way like you said.
Apndroid works fine on my captivate!
Sent from my SAMSUNG-SGH-I897 using XDA App
hazard96 said:
Apndroid works fine on my captivate!
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
You see the 2G icon when you run it?
On my Captivate APNdroid only partially works. Let me explain. If WiFi is on I can disconnect 3G using the APNdroid widget (then if I turn off WiFi and try to surf the web I can't.) However turning 3G back on is more complex. I can turn it back on using the widget if I m connect already to a WiFi network and it will turn 3G on when I turn off WiFi. HOWEVER you must be connected to a WiFi network to turn 3G back on not being connected to a network means the APNdroid button doesn't work. The only solution I found to turn on 3G if I wasn't connected to a WiFi network was to turn on 3G through the APNdroid widget and then restart the phone.
On the other hand I am currently using Juice Defender and their 3G WiFi widget works without having to jump through all those hoops.
@icedfire101
Thanks for the info. I downloaded the free version of JuiceDefender today and so far I am happy with the results.
Samsung Captivate 3G Toggle Solution
After all the digging and searching around, I found two apps that work perfectly on Samsung Captivate for toggling mobile data (3G)
- Juicedefender (it has a widget you can use to toggle 3G quickly)
- SMODA Widget (It doesnt have too many 5 star ratings but works fine on my samsung captivate).
My phone is rooted but I believe it is not a requirement of either of the above apps. Hope this info is useful for other captivate owners.
Most of the other APN / 3G toggle apps on the market try to put a suffix on the APN names in settings. On the samsung captivate this works only with a restart/reboot. Meaning if you disable 3G using the app it would put a suffix like 'disabled' or something to the APN name. But your phone still has the 3G connection using the original APN settings. Only after you restart the phone does it see the 'disabled' APN name and is not able to use and hence no 3G. Vice versa when you want to enable 3G back - needs restart.
I dont know what process the above 2 apps use but they work instantly on my samsung captivate. No need to restart or click a bunch of other settings. They work perfectly and as simple as it should be.
Concepts behind Reliable 3G Toggling on Captivate
First time poster, hope its not immediately dismissed as TLDR.
For the quick-and-dirty just read the “Reliable Data Disabling”.
I am an advocate for understanding concepts. Solutions, hacks and work-arounds have their place, but, if we can understand more about how and why those solutions work, we might be able to repurpose those ideas and use those ideas to make better applications.
Upload and Download of data coming from the cellular network (as opposed to wifi) is likely determined by which network adapter the network connections are making use of. This might be determined by the android sub-system, by looking at the details of currently open sockets; or by lower-level processes looking at the addresses associated with Rx/Tx data. There are several other ways this could be achieved, and I am sure there are countless people who know exactly how that little 3g icon gets on screen; I am merely laying the groundwork to point out that the Captivate (and possibly the Samsung ROM specifically) is apparently more adept at retaining these residual 3g connections than other Android ROMs.
Let’s assume background data opens a series of sockets to communicate with all of the servers that a person’s phone will sync with. By obfuscating the APN like APNDroid does, we are changing the source of the configuration settings, but connections which are "kept-alive" would not check for new settings. This is why those connections remain open after we activate APNDroid. From this idea we derive at least two strategies that work:
Reliable Data Disabling:
Once an APN obfuscator has effectively disabled 3g by spoofing APN information, you can follow up the data-shutdown with the one-two punch of either disabling the cellular radio, or by intelligently terminating connections that don’t match the current APN paradigm. My understanding is there are no apps that take advantage of the latter.
Disabling the radio: Those who have a shortcut-to-activity application, one might feel compelled to use the “Testing” activity to disable the cellular radio, but, the contents of Testing can be dangerous. It is possible to cause problems with your phone using the Phone Information section of "Testing".
The Captivate is nice and fast, enabling flight-mode and disabling it after 10 seconds terminates all residual data-connections 95% of the time.
1. Activate APNDroid (or other APN Obfusctor)
2. Activate Flight Mode (or disable cellular radio some other way)
3 Disable Flight Mode (or reactivate cellular radio)
----
In the past 2 weeks I have discovered that when I re-enable my data, the 3g icon comes back right away but my phone makes no attempt to create new connections using the restored settings. The only solution I have found (so far) is to reboot the phone which only works about half the time. I have not stepped through the problem with the android debugger.
Has anyone else noticed this?
i use smartbar , it turns on/off data and does much more.
Best way to turn off 3g data in samsung captivate
To disable data connection.
In phone menu type *#*#4636#*#*
a menu will appear. In that click "phone information".
click the option button (which is the bottom left button you have in phone).
In that go to "more" option.
inside that click "disable data connection".
Thats it 3g icon will not appear up there in phone. but you can use wi-fi.
To enable it .
do the same thing above . but at the final moment you will be shown a menu with option "enable data connection".
clicking it wont immediately enable data connection. you have to restart your phone.
If you dont want to restart your phone .
then go to settings->wireless and networks->mobile networks->access point names.
there should be apn called "ATT WAP".
Click the more option button at the bottom left and click "reset to default".
Thats it. Now your 3g icon will appear at the top (provided wi-fi is turned off).
tonberry1031 said:
1. Activate APNDroid (or other APN Obfusctor)
2. Activate Flight Mode (or disable cellular radio some other way)
3 Disable Flight Mode (or reactivate cellular radio)
----
In the past 2 weeks I have discovered that when I re-enable my data, the 3g icon comes back right away but my phone makes no attempt to create new connections using the restored settings. The only solution I have found (so far) is to reboot the phone which only works about half the time. I have not stepped through the problem with the android debugger.
Has anyone else noticed this?
Click to expand...
Click to collapse
Good post. You are correct that the captivate will indeed hold onto the valid connection even after modifying the APN. Flight mode toggling will sever the connection forcing it to use the modified settings which should prevent it from reconnecting to data.
The way I disabled my data connection before froyo (all hail froyo data power- button toggle) was to make a shortcut to my APNs and I made a "disabled" APN that was just called disabled. I would have to select it and then toggle flight mode to disable, but reconnecting was as simple and just selecting the real APN and it would immediately reconnect. Never had to restart phone to reconnect, except when using programs from the market.
mettup said:
To disable data connection.
In phone menu type *#*#4636#*#*
a menu will appear. In that click "phone information".
click the option button (which is the bottom left button you have in phone).
In that go to "more" option.
inside that click "disable data connection".
Thats it 3g icon will not appear up there in phone. but you can use wi-fi.
To enable it .
do the same thing above . but at the final moment you will be shown a menu with option "enable data connection".
clicking it wont immediately enable data connection. you have to restart your phone.
If you dont want to restart your phone .
then go to settings->wireless and networks->mobile networks->access point names.
there should be apn called "ATT WAP".
Click the more option button at the bottom left and click "reset to default".
Thats it. Now your 3g icon will appear at the top (provided wi-fi is turned off).
Click to expand...
Click to collapse
So how well does this work?
I'm going to Europe tomorrow and I don't want to be eaten alive on roaming data.
Thanks,
Super
Quick Settings in market, works great on my captivate.
Superguy said:
So how well does this work?
I'm going to Europe tomorrow and I don't want to be eaten alive on roaming data.
Thanks,
Super
Click to expand...
Click to collapse
Depending on what countries you're visiting and for how long, you might consider getting a prepaid local SIM card from that country. I've done that in a couple of different countries and was able to get prepaid data deals for a $2-$3 a day. Will vary greatly depending on country and carrier. And, of course, your phone will have to be carrier-unlocked to use the SIM card.
Hey guys.
My co-worker has a G2X has well. He'll be traveling to Spain at the end of this month. Would there be a way to use Wifi calling without incurring charges?
From the T-Mobile Cust. Service rep told us we'd need to have the phone on airplane mode ON & Data Roaming Off. If we have the airplane mode ON the Wifi Calling app doesn't let us turn on Wifi Calling. So what can he do not to get any sort of bill increase while he's over there?
Having airplane mode ON obviously will disable wifi calling since it disables EVERYTHING (radio, bt, wifi, etc.).
Log onto wifi, enable wifi calling, place your call. It works overseas like it does here domestically.
GideonX said:
Having airplane mode ON obviously will disable wifi calling since it disables EVERYTHING (radio, bt, wifi, etc.).
Log onto wifi, enable wifi calling, place your call. It works overseas like it does here domestically.
Click to expand...
Click to collapse
Well, if I enable Airplane Mode ON, then I can still go right after and enable Wifi and surf the web with Wifi. It even still shows Airplane Mode as being ON. The thing is that Wifi Calling doesn't like airplane mode on. Err. So What do I need to disable in order not to see any insane charges of the phone roaming onto cell towers, 2G, 3G, 4G, etc?
flexnix said:
Well, if I enable Airplane Mode ON, then I can still go right after and enable Wifi and surf the web with Wifi. It even still shows Airplane Mode as being ON. The thing is that Wifi Calling doesn't like airplane mode on. Err. So What do I need to disable in order not to see any insane charges of the phone roaming onto cell towers, 2G, 3G, 4G, etc?
Click to expand...
Click to collapse
Turn data roaming off. I use the wifi calling feature from China quite a bit and to avoid crazy bills make sure data roaming stays off and only use the phone when connected to wifi.
jlevy73 said:
Turn data roaming off. I use the wifi calling feature from China quite a bit and to avoid crazy bills make sure data roaming stays off and only use the phone when connected to wifi.
Click to expand...
Click to collapse
Follow this ^^^ and you are golden.
If Data Roaming is turned off, and I go to Canada, will I get an extra charge for incoming text messages?
I used to use Wi-Fi Calling internationally all the time on my G2. In order for it to activate, it has to register on a cell network first. So if you're roaming, you still need to allow the phone to pick up and show connected to the foreign cell network. Then when you activate Wi-Fi calling it disables the cell connection. Make sure you turn Wi-Fi Calling off before disconnecting from Wi-Fi. Otherwise it gets stuck and you won't be able to turn it off and get your cell signal back until you connect to a Wi-Fi signal again.
Some warnings. When first connecting to the foreign carrier's network, make sure the data connections on the phone are disabled. Otherwise the phone will automatically start syncing and T-Mobile's data roaming fees are outlandish. My G2 always disabled the cell signal when Wi-Fi Calling was enabled. I used the G2X once overseas and, because the cell signal indicator still showed active, I wasn't sure that everything I was doing was over Wi-Fi. Have your friend watch for this.
Not entirely true regarding cell network connection.
I've used wifi calling in datacenters with zero cell reception. It registers and enables without needing to connect to anything first.
Very helpful, I'll just disable mobile data all together once I am out of the US!
So data roaming being turned off will solved that. Ok. How about text messages? Will they not come in until he enables Wifi calling or if they come in he'll be charged an insane amount.
flexnix said:
So data roaming being turned off will solved that. Ok. How about text messages? Will they not come in until he enables Wifi calling or if they come in he'll be charged an insane amount.
Click to expand...
Click to collapse
If you have a messaging bundle or plan, international messages you receive will be pulled from your bundle. (quote from T-Mobile's website)
So basically, if I have unlimited international texting, and I receive texts while in Canada, I'm good?
Problem is that wifi calling is sensitive to having good wifi signal and it is easy to drop wifi calling without noticing it. And you could be making texts or calls on international roaming rates and not know it.
So, can you turn off cell service some how? Not just data, but voice too? And not airplane mode, because that disables wifi calling. So is there a way to turn off just cell service?
wildcard said:
Problem is that wifi calling is sensitive to having good wifi signal and it is easy to drop wifi calling without noticing it. And you could be making texts or calls on international roaming rates and not know it.
So, can you turn off cell service some how? Not just data, but voice too? And not airplane mode, because that disables wifi calling. So is there a way to turn off just cell service?
Click to expand...
Click to collapse
Just completely uncheck roaming and International roaming. Was in the carribean and I never connected to a network.
Sent from my LG-P999 using xda app-developers app
redmonke255 said:
Just completely uncheck roaming and International roaming. Was in the carribean and I never connected to a network.
Sent from my LG-P999 using xda app-developers app
Click to expand...
Click to collapse
However, that only works for data roaming? You will still connect to a voice network no matter what. Is there a way to not connect to a roaming voice network?
wildcard said:
However, that only works for data roaming? You will still connect to a voice network no matter what. Is there a way to not connect to a roaming voice network?
Click to expand...
Click to collapse
I didn't connect to one. Under network providers, select only yours. Don't let it choose automatically.
Sent from my LG-P999 using xda app-developers app
So...I am at an office today that I have zero cell coverage since I am in the basement sitting in a network closet. I enabled WiFi calling and I am able to place and receive calls. However, when the screen goes off and the phone locks I do not get any inbound calls. When I call from a land line the call just rings and rings and rings and never gets VM and my cell phone does not ring.
Has anyone else played around with WiFi calling and seen this behavior? I am assuming that WiFi goes into some type of power save mode and disables the WiFi radio when the phone locks.
-CMYLXGO
cmylxgo said:
I am assuming that WiFi goes into some type of power save mode and disables the WiFi radio when the phone locks.
-CMYLXGO
Click to expand...
Click to collapse
Sounds right. I don't have my Sensation yet, and have never had an HTC (gotta switch from my Vibrant this week due to GPS issues), but it looks like this may solve your problem.
Menu > Settings > Wireless and Networks > Wi-Fi Settings
On the Wifi Settings screen, press the Menu button and choose Advanced.
howetechnical said:
Sounds right. I don't have my Sensation yet, and have never had an HTC (gotta switch from my Vibrant this week due to GPS issues), but it looks like this may solve your problem.
Menu > Settings > Wireless and Networks > Wi-Fi Settings
On the Wifi Settings screen, press the Menu button and choose Advanced.
Click to expand...
Click to collapse
Yah...I already tried that. I checked Best Wi-Fi performance and adjusted my Sleep policy to never. Still no dice. I have even noticed that it doesn't always ring right away when unlocked. This is a very poor performing app IMO. It seems to work well if you need to make a call...but inbound is unreliable.
-CMY
cmylxgo said:
Yah...I already tried that. I checked Best Wi-Fi performance and adjusted my Sleep policy to never. Still no dice. I have even noticed that it doesn't always ring right away when unlocked. This is a very poor performing app IMO. It seems to work well if you need to make a call...but inbound is unreliable.
-CMY
Click to expand...
Click to collapse
older issue but may help
http://forums.t-mobile.com/t5/T-Mob...o-Incoming-Calls-while-in-Standby/td-p/835771
userguide incase you don't have it
page 46 of User Manual
Changing Wi-Fi Calling settings
1. On the Wi-Fi Calling screen, press and tap Settings > Connection
preferences.
2. Select a connection option, and then tap OK.
[Wi-Fi Preferred] When you make calls, the Wi-Fi network is preferred over the
cellular network. You must stay in the Wi-Fi range when
calling.
[Cellular Preferred]
When you make calls, the cellular network is preferred over
the Wi-Fi network.
[Wi-Fi Only] HTC Sensation 4G will always use the Wi-Fi network when
you make a call. You must stay in the Wi-Fi range when
calling.
http://pocketpccentral.net/pdfs/HTC_Sensation_4G_UG.pdf
I see you have one thing to do on your list when you unlock your phone LOL
I use WiFi calling at home and I have WiFi set at the default setting, not Best WiFi. I also have WiFi preferred set on my phone. My phone has been sitting for > 1hr with the screen locked/dark and it rang when I called it from my home line. Doesn't seem to be an issue here at all with it not ringing.
carl1961 said:
older issue but may help
http://forums.t-mobile.com/t5/T-Mob...o-Incoming-Calls-while-in-Standby/td-p/835771
Click to expand...
Click to collapse
Seems to be the same issue I had. I'll try and do some testing on my home network tonight.
-CMY
If you use any app like juice defender to control your WiFi make sure it will not disconnect you while your screen is off. May not be your issue but it was mine untill I changed settings. I make and recieve calls just fine now and no missed calls.
Sent from my HTC Sensation 4G using XDA Premium App
One interesting thing I just noticed...I can send and receive SMS while using WiFi Calling
-CMYLXGO
cmylxgo said:
One interesting thing I just noticed...I can send and receive SMS while using WiFi Calling
-CMYLXGO
Click to expand...
Click to collapse
wifi calling shuts off your phone radio & routes everything over wifi
xnifex said:
wifi calling shuts off your phone radio & routes everything over wifi
Click to expand...
Click to collapse
I still see my phone connect or at least check the connection over the network not using WiFi though. My WiFi signal is strong and I'll see the 2G signal pop up for a second and then go dormant again. So something is definitely checking but yeah pretty much everything goes out over your WiFi connection but the radios do turn on from time to time from what I can see.
Seems to be working on my home network fine CMY ..
Can receive and make calls ok ..
I have mine set to ..
1. WIFI Sleep - Never ( However I changed it to 15 minutes then back )
2. Best WIFI Performance
I did notice you have to press the menu key and pick SAVE
to save the settings ..
Seems to work at my other office today. I have it set to WiFi Perfered. The only differnce here is that I actully get GSM signal in most of the building. Anyways...I'll do more testing when time permits and report back my findings. Thanks for all those that chimed in.
Now just need to get GPS to lock in a resonable time frame.
-CMY
carl1961 said:
older issue but may help
http://forums.t-mobile.com/t5/T-Mob...o-Incoming-Calls-while-in-Standby/td-p/835771
userguide incase you don't have it
page 46 of User Manual
Changing Wi-Fi Calling settings
1. On the Wi-Fi Calling screen, press and tap Settings > Connection
preferences.
2. Select a connection option, and then tap OK.
[Wi-Fi Preferred] When you make calls, the Wi-Fi network is preferred over the
cellular network. You must stay in the Wi-Fi range when
calling.
[Cellular Preferred]
When you make calls, the cellular network is preferred over
the Wi-Fi network.
[Wi-Fi Only] HTC Sensation 4G will always use the Wi-Fi network when
you make a call. You must stay in the Wi-Fi range when
calling.
http://pocketpccentral.net/pdfs/HTC_Sensation_4G_UG.pdf
I see you have one thing to do on your list when you unlock your phone LOL
Click to expand...
Click to collapse
still helping out and dont have the sensation?! ur the man CARL like seeing the familiar faces from the old thread....CMY/CARL/WARLOCK
cmylxgo said:
Seems to work at my other office today. I have it set to WiFi Perfered. The only differnce here is that I actully get GSM signal in most of the building. Anyways...I'll do more testing when time permits and report back my findings. Thanks for all those that chimed in.
Now just need to get GPS to lock in a resonable time frame.
-CMY
Click to expand...
Click to collapse
cmy,
Have you had any luck solving the wifi calling or GPS lock? My Sensation takes forever to get a GPS lock (if at all sometimes) - way slower than a friend's G2. I've had luck setting the wifi calling to cellular preferred. That seems to have helped me, based on what testing I can do. In your case you need wifi preferred and I'd like to be able to use that option too. Is it possible your office (and mine) is blocking something on the wifi network that is preventing it? At home, I haven't heard of anybody calling me and it not ringing - just at work.
yyzfan
Wifi calling = FAIL unless with google/voice.
Tell your provider to suck less and reinvest.
Wifi calling is working great for me...I have no reception at my house wifi calling has been a savior. I use the same settings that warlock mentioned earlier
Sent from my HTC Sensation 4G using XDA Premium App
Thanks. I'm going to write it off as my office blocking a port that wifi calling needs, or something like that. I have mine set to prefer cellular and that seems to make it function at work. At home, where I live in a T-mobile deadzone, it seems to switch over to wifi properly.
Is there a way to configure the flight mode?
Actually the flight mode turn off GSM signal - wifi - bluetooth
I would like to have the choice of what I turn off (or at least only turn off the cell signal and keep my wifi active)
any idea?
Thanks a lot
Root your phone and install cm7 which has settings to choose when wifi enabled then disable data
CM7 SkyRocket
thanks but CM7 is still in alpha and I rather wait for a stable version
floppy__ said:
I would like to have the choice of what I turn off (or at least only turn off the cell signal and keep my wifi active)
any idea?
Thanks a lot
Click to expand...
Click to collapse
One option: Menu.... Settings... Wireless and networks... Mobile networks... and uncheck "Use Packet Data". This will shut off your data connection. Also, take a look at JuiceDefender Ultimate in the Market.... tons os settings to control WiFi and data automatically.
DoctorQMM said:
One option: Menu.... Settings... Wireless and networks... Mobile networks... and uncheck "Use Packet Data". This will shut off your data connection. Also, take a look at JuiceDefender Ultimate in the Market.... tons os settings to control WiFi and data automatically.
Click to expand...
Click to collapse
Thanks but in fact it's not my data connection I want to shut off, it's my voice connection. Where I work I have no signal but they have a good wifi, I use Groove IP to receive and make call with google voice.
I want to be in airplane WITH wifi just to keep my battery
Hi
Is it possible to Turn off Mobile network without turning airplane mode on?
Want to be able to use wifi to sent messages etc & not my mobile network
deleted
jt1998 said:
I have this setup currently. I use quickshortcut maker LINK from the play store. When you open the app, it default to incremental search. Type in data usage and several results pop up. In there is settings. Under settings, is the 2nd choice called data usage. Choose it, and the next screen lets you try the shortcut you're making. Click it and it should bring up your mobile data screen where you can toggle the data on/off with just one button! PRESTO!!
Enjoy.
Click to expand...
Click to collapse
Turning mobile data off is not the same as aeroplane mode - your cellular radio is still active and you can send and receive calls and SMS messages.
Assuming the OP really wants no cellular radio, what they need to do is switch on aeroplane mode, and then switch WiFi back on again.
Regards,
Dave
Sent from my Pixel 2 XL using Tapatalk
There's a toggle for it in the drop down menu, or am I missing something?
RazoE said:
There's a toggle for it in the drop down menu, or am I missing something?
Click to expand...
Click to collapse
Not mobile data! mobile phone calls is what i want to turn off, so i can use wifi calling!
priisek said:
Not mobile data! mobile phone calls is what i want to turn off, so i can use wifi calling!
Want to be able to use wifi to sent messages etc & not my mobile network
Click to expand...
Click to collapse
Not what you had specified.
RazoE said:
Not what you had specified.
Click to expand...
Click to collapse
I asked how to turn off network? not mobile data. two different things!
priisek said:
I asked how to turn off network? not mobile data. two different things!
Click to expand...
Click to collapse
As I said earlier, you need to switch on aeroplane mode, and then turn Wifi back on again.
You can switch on both Wifi and Bluetooth when aeroplane mode is on.
Regards,
Dave
Sent from my SM-G955F using Tapatalk
foxmeister said:
As I said earlier, you need to switch on aeroplane mode, and then turn Wifi back on again.
You can switch on both Wifi and Bluetooth when aeroplane mode is on.
Regards,
Dave
Sent from my SM-G955F using Tapatalk
Click to expand...
Click to collapse
Is there any other way than airplane mode, dont want to be in there as it stops other thinmgs on my phone which i still want on thanks
I do not know what you mean
I do not know what you mean
Hello. More details please... Why do u want cell data off? If you set up wifi calling and use the preferred call method of wifi calling you don't need to do what your trying to do.
TRY THE FOLLOWING.....
Turn on Wi-Fi and connect to a Wi-Fi network.
From the Home screen, swipe up on an empty spot to open the Apps tray.
Tap Settings > Connections.
If necessary, slide the Wi-Fi switch right to the ON position.
Tap More connection settings.
Tap Wi-Fi Calling, now Select one of these options:
Wifi preferred
Cellular network preferred
Never use cellular network
Choose never use cellular network, and when u have a wifi connection your phone will use wifi calling not your carrier network.
This is how you do what your trying to accomplish I believe.