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sbailey4

macrumors 601
Dec 5, 2011
4,571
3,253
USA
The wifi calling when enabled - seems to be cellular preferred and switches to wifi when you're connected to a decent enough wifi hot spot when the cellular signal goes below -100 and switches back when it goes to -95 or above... or when the the cellular signal is something less than two full dots to switch to wifi and back to cellular when there are 3 dots or stronger cellular signal available.
I seem to have the same functionality. Problem is in my house I can get from 4 bars to 2 bars of cellular service back and forth. So Wifi calling comes and goes. Seems when on a call it switches randomly and of course disconnects the call. Anyone noticing the wifi to cellular or vice versa hand-off doesn't seem to work? Is it supposed to?
 

soccerjoshj07

macrumors regular
Oct 11, 2011
241
55
I seem to have the same functionality. Problem is in my house I can get from 4 bars to 2 bars of cellular service back and forth. So Wifi calling comes and goes. Seems when on a call it switches randomly and of course disconnects the call. Anyone noticing the wifi to cellular or vice versa hand-off doesn't seem to work? Is it supposed to?
FYI, it appears that for at least my apartment it kicks in with 2 bars and under. I also have limited LTE there so maybe that is why.
 

gmanist1000

macrumors 68030
Sep 22, 2009
2,867
895
What happens if you have a weak Wi-Fi signal and you have this turned on? At work, my Wi-Fi signal occasionally drops, but then reconnects soon after. How would this impact Wi-Fi calling? Would Wi-Fi calling reconnect automatically soon after?
 

Atreyu25

macrumors 6502
May 31, 2005
289
163
Good question. I assume that there is some requirement of Wifi signal strength to kick it in.
 

kch50428

macrumors 6502
Oct 30, 2015
323
572
North Iowa
What happens if you have a weak Wi-Fi signal and you have this turned on? At work, my Wi-Fi signal occasionally drops, but then reconnects soon after. How would this impact Wi-Fi calling? Would Wi-Fi calling reconnect automatically soon after?
Depends on available cellular signal - if you're getting 2 full dots plus in signal, it will stay cellular until the cell signal drops to less than 2 full dots signal... or around -100 if you have field test mode on.
 

sbailey4

macrumors 601
Dec 5, 2011
4,571
3,253
USA
What happens if you have a weak Wi-Fi signal and you have this turned on? At work, my Wi-Fi signal occasionally drops, but then reconnects soon after. How would this impact Wi-Fi calling? Would Wi-Fi calling reconnect automatically soon after?
Yeah Thats the good and bad part. It connects automatically and disconnects depending on the cellular strength at any moment. So during a call it seems to switch back and forth and cuts off the call. At least in my experience. Wifi strength doesnt seem to play as big a part as cellular signal strength. Seems it should connect to wifi and just stay there as long as wifi is available but apparently its cellular dependent only and since that fluctuates seems a little problematic. I have just turned it off for now as I typically have good cell signal most of the time. Especially when phone is awake and being used.
I guess its really designed for times when there is low or no cell signal pretty consistently. Not so much when your cell signal fluctuates from 2-4 bars. Thats seems to cause problems.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
51,392
19,461
Yeah Thats the good and bad part. It connects automatically and disconnects depending on the cellular strength at any moment. So during a call it seems to switch back and forth and cuts off the call. At least in my experience. Wifi strength doesnt seem to play as big a part as cellular signal strength. Seems it should connect to wifi and just stay there as long as wifi is available but apparently its cellular dependent only and since that fluctuates seems a little problematic. I have just turned it off for now as I typically have good cell signal most of the time. Especially when phone is awake and being used.
I guess its really designed for times when there is low or no cell signal pretty consistently. Not so much when your cell signal fluctuates from 2-4 bars. Thats seems to cause problems.
It shouldn't be cutting off the call if you are using VoLTE as there should be handoff between LTE and Wi-Fi. If you are on 1x essentially for calls, then, yes, unfortunately there's no handoff between that and Wi-Fi.
 

gmanist1000

macrumors 68030
Sep 22, 2009
2,867
895
Yeah Thats the good and bad part. It connects automatically and disconnects depending on the cellular strength at any moment. So during a call it seems to switch back and forth and cuts off the call. At least in my experience. Wifi strength doesnt seem to play as big a part as cellular signal strength. Seems it should connect to wifi and just stay there as long as wifi is available but apparently its cellular dependent only and since that fluctuates seems a little problematic. I have just turned it off for now as I typically have good cell signal most of the time. Especially when phone is awake and being used.
I guess its really designed for times when there is low or no cell signal pretty consistently. Not so much when your cell signal fluctuates from 2-4 bars. Thats seems to cause problems.

I usually only have 1 bar in my office. My Wi-Fi strength is decent, but it just drops occasionally. I'll test it out and see what happens.
 

BigMcGuire

Cancelled
Jan 10, 2012
9,832
14,032
WiFi calling On (and showing VZW Wi-Fi on top left) - was on a 40 min call, bars rotated 1-2 bars. After propping up my phone so it could get 3 bars (speakerphone), it just switched to Verizon after a few mins of holding 3 bars and the call went silent and eventually failed. :/ But 40 mins of wifi-calling with no problems, lag, or any noticeable problem. Pretty good imo.

Turned on Airplane mode and am on WiFi calling now. May just do that from now on.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
51,392
19,461
WiFi calling On (and showing VZW Wi-Fi on top left) - was on a 40 min call, bars rotated 1-2 bars. After propping up my phone so it could get 3 bars (speakerphone), it just switched to Verizon after a few mins of holding 3 bars and the call went silent and eventually failed. :/ But 40 mins of wifi-calling with no problems, lag, or any noticeable problem. Pretty good imo.

Turned on Airplane mode and am on WiFi calling now. May just do that from now on.
Do you have Voice enabled for LTE?
 

BigMcGuire

Cancelled
Jan 10, 2012
9,832
14,032
Do you have Voice enabled for LTE?

Yes - Wife has same phone as me (iPhone 6+) with HD Voice as well. It almost worked, so I may try it again (right now talking to her with Airplane Mode on via WiFi calling).

lol turned off airplane mode and the wifi call held (she's still on the phone with me), will try to get it to go to Verizon again by holding it up in the good part of the house. Will report back.
[doublepost=1458782980][/doublepost]It must be learning cuz I can't get it to switch no matter what I do. It's staying on WiFi calling. Will report back if it attempts to switch again.
[doublepost=1458785102][/doublepost]Just walked away from my house while on a Wi-Fi call and it seamlessly switched to Verizon (cellular) instantly.

So it works, I guess I was just unlucky for my first switchover.
 

nooaah

macrumors 68000
Sep 3, 2009
1,600
165
Philadelphia, PA
Depends on available cellular signal - if you're getting 2 full dots plus in signal, it will stay cellular until the cell signal drops to less than 2 full dots signal... or around -100 if you have field test mode on.
I've been at like -105 and didn't see the WiFi pop up in the status bar. On at&t it basically was on all the time.
 

sbailey4

macrumors 601
Dec 5, 2011
4,571
3,253
USA
It shouldn't be cutting off the call if you are using VoLTE as there should be handoff between LTE and Wi-Fi. If you are on 1x essentially for calls, then, yes, unfortunately there's no handoff between that and Wi-Fi.
Do you have Voice enabled for LTE?
Mostly LTE here. and yes VoLTE is enabled. I see another user, @BigMcGuire had same issue when it switched. Something not 100% here. Maybe the cutoff happens if it switches back to wifi from LTE? Its only a one way switch correct? From wifi to LTE if say you leave your house while on a call. I finally turned of wifi calling and phone works better. Strange the LTE signal seems stronger too (more bars) when only on LTE.
 
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C DM

macrumors Sandy Bridge
Oct 17, 2011
51,392
19,461
Mostly LTE here. and yes VoLTE is enabled. I see another user, @BigMcGuire had same issue when it switched. Something not 100% here. Maybe the cutoff happens if it switches back to wifi from LTE? Its only a one way switch correct? From wifi to LTE if say you leave your house while on a call. I finally turned of wifi calling and phone works better. Strange the LTE signal seems stronger too (more bars) when only on LTE.
Works fine here switching from WiFi to LTE.
 

BigMcGuire

Cancelled
Jan 10, 2012
9,832
14,032
@sbailey4 and @C DM It was just the very first switch from WiFi to LTE that gave me a "call failed" but ever since then, it's worked flawlessly - a handful of times now since March 23, perfectly and instantly even while someone is talking. I'm very happy with it.

Good question, it is only WiFi to LTE right? Or can it go from LTE to WiFi too?

Edit: @sbailey4 I too have noticed stronger LTE when I turn off the WiFi radio and bluetooth radio. But I figured it was just my imagination.
 
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