Develop Bugs

Losing WiFi Connection Intermittently

Here's the deal: my S2 keeps disabling its WiFi connection. I’ll be connected to my router for a while, sometimes for 12+ hours at time, when all the sudden my S2 will lose its WiFi connection and switch to 4G. When I go into my WiFi settings, it will say that my router is “Not in range” and show no other available networks (even though there are dozens in this area).
I can sometimes get my connection back by toggling Airplane mode or “use packet data” on/off. But nothing works %100 percent of the time. I don’t think it’s a router issue either because we had 4 smartphones in this house over Christmas and the only two that lost their WiFi connection were my and my wife’s S2s.
Anyone else encounter this?
(p.s. Phone is stock, by the way.)

If you have the Tmobile my account disable or uninstall it.I made a thread about this awhile back. It has something where it needs to stay connected to 4g or intermittently puts data on and cuts wifi off I used to have this problem before not no more after uninstalling it.

Thanks, sarni. I read your thread a couple days ago (when I was trying to figure out what was going on), but I'm not sure we're having the same issue. My WiFi and 4G icons aren't on at the same time, for instance.
The other problem is that I haven't rooted my phone, so uninstalling T-Mobile's "My Account" app isn't an option.
Yet.

Happening again now.
Phone seems to be stuck in the following loop: scanning for available WiFi networks, seeing them all, locking in on my WiFi network, trying to obtain an IP address, then back to scanning again without a connection.
No toggling of settings broke the loop until I powered on/off.

4.3 Wi-Fi bug?

Anyone else notice Wi-Fi randomly deciding to turn off/not connect to automatic networks, like your home or office?
I notice that sometimes I'll pick up my phone and go to use the VPN and it will say I can't connect because I'm not connected to the Internet. Or I'll get an email in Gmail while using my laptop and wonder why my phone didn't beep just then and notify me. I then look in the to corner and see it isn't connected to my network, nor making an attempt to. The Wi-Fi signal symbol just isn't there. The Wi-Fi quick settings button is highlighted meaning Wi-Fi is in fact enabled, but it isn't connected to it for some reason. The second I go look at the network list -- and it does see all the networks so I know for sure it is enabled and scanning -- it instantly tries to connect and does so perfectly fine.
I thought it was just a bad signal once or a router issue, but it has happened several times now since updating to 4.3. This has never happened before.
It's just like it randomly decides not to try and connect to the network unless I open up the network list. It's random as far as I can tell. It's usually fine, but it has happened on more than one occasion now since upgrading to 4.3.
Any ideas? I haven't changed any settings since 4.3. I thought it might be battery/idle related, but once I get it to connect again, it stays connected no matter what the status of the battery or how long it's idle. This makes me think it's probably a bug.

Wifi Calling issue

This morning I decided to do the lollipop update, everything seemed to go well and im pretty sure my wifi calling was working after I did the update, now later on this afternoon I cant get it to connect its showing a wifi calling symbol on my notification bar with a slash through it and keeps telling me Wifi Calling connection error, anyone have any idea how to fix this? Thanks!!

Yep, I'm getting the same thing today. It happened the other day and I restarted my phone and it resolved itself. Today a restart hasn't fixed it. No idea why it's not working. Nothing has changed with my phone's software. Doesn't make any sense.

cody_cummins said:
This morning I decided to do the lollipop update, everything seemed to go well and im pretty sure my wifi calling was working after I did the update, now later on this afternoon I cant get it to connect its showing a wifi calling symbol on my notification bar with a slash through it and keeps telling me Wifi Calling connection error, anyone have any idea how to fix this? Thanks!!
Click to expand...
Click to collapse
I didn't try WiFi calling since the update last week, and sure enough, I had the same issue. I even went as far as doing packet captures on my network to see what the issue was. I found a few "fixes" on the Sprint forums but none worked. So, I have two SSID's at my house, one is 2.4Ghz and one is 5Ghz (a new access point) I always connect to the 5ghz here at the house (but I don't use wifi calling at my house). So, for the heck of it, I switched my connection to the 2.4Ghz and turned on Wifi calling and BAM! It worked(I had previously used wifi calling on this network when I was testing it out when I first got my phone last year)! I switched back to the 5Ghz, didn't work. What I did to get it working: While I switched back to the 2.4ghz AP, i went into SETTINGS-WIFI CALLING, pressed and held on the 5Ghz network and tapped "remove", then re-added that SSID to wifi calling and now it works.
Please note I also have "Wi-fi Range Alert" and "Update address Notification" selected in Wi-Fi Calling settings (three dots on the upper right hand) and it did ask me to update my address information (and I saved the information). Not sure if this is critical, but I can only say this fixed the issue I had. Also note that I had previously tried:
1) Clearing the cache from APPLICATION MANAGER-ALL-> WFC SETTINGS and WI-FI CALLING
2) Dialing ##72786#
I can't say for sure doing the above two things actually did anything to help.

Earlier I tried reprovisioning my phone and it didn't fix it, also tried other things, so decided to give sprint a phone call a little bit ago and they had me go through the provision process again but they were refreshing it on they're end and it fixed the issue, hope the same works for you!!
Edit: Maybe that's what I didn't do was clear the cache before provision, I did it after wards!

MrSickle said:
I didn't try WiFi calling since the update last week, and sure enough, I had the same issue. I even went as far as doing packet captures on my network to see what the issue was. I found a few "fixes" on the Sprint forums but none worked. So, I have two SSID's at my house, one is 2.4Ghz and one is 5Ghz (a new access point) I always connect to the 5ghz here at the house (but I don't use wifi calling at my house). So, for the heck of it, I switched my connection to the 2.4Ghz and turned on Wifi calling and BAM! It worked(I had previously used wifi calling on this network when I was testing it out when I first got my phone last year)! I switched back to the 5Ghz, didn't work. What I did to get it working: While I switched back to the 2.4ghz AP, i went into SETTINGS-WIFI CALLING, pressed and held on the 5Ghz network and tapped "remove", then re-added that SSID to wifi calling and now it works.
Please note I also have "Wi-fi Range Alert" and "Update address Notification" selected in Wi-Fi Calling settings (three dots on the upper right hand) and it did ask me to update my address information (and I saved the information). Not sure if this is critical, but I can only say this fixed the issue I had. Also note that I had previously tried:
1) Clearing the cache from APPLICATION MANAGER-ALL-> WFC SETTINGS and WI-FI CALLING
2) Dialing ##72786#
I can't say for sure doing the above two things actually did anything to help.
Click to expand...
Click to collapse
It was fixed, now its doing it again, I bet its this sweet modem that im renting from Comcast, what a joke of a company

Having the same issue sperradically. Literally just before clicking on this thread I went to my phone and it had the symbol with the exclamation mark, pulled it down said "Connection Erro..." tapped on it, made a 'boop' sound then nothing) which is what I had since I got home around 5:30 today... and by the time Ifinished reading these posts, it went back to "WiFi Calling is Ready"
today I wonder if they were doing maintenence or something since a lot of ppl had the problem, (for me I first turned it on day-before-yesterday and it worked great till today though I might just have been lucky) I tried turning it off and on, I tried forcing stop and restarting, re-setting my location, etc and I still got the same error till just now, so... yeah... Sprint WiFi Calling seems flakey... (I have a skype in/out account I've been using for calls since I dont get decent reception and was hoping to replace it with this, but...)

Same here, decided to update this morning and WIFI calling is dead Jim. Tried reprovisioning after a cache clear, no change. Still dead, which sucks because I depend on it due to my in house signal being so poor.
Anyone have any other ideas?

If your desperate you can do what I did to solve my lack-of-reception...
Set up Skype
Add a skype-in number (~$4/month iirc)
Add skype out subscription (~$4/month iirc)
Activate "Google Voice Integration" on your sprint account
Add the skype-in number to google voice
turn off voice to the sprint mobile device (inside google voice)
Now when people call your number it gets routed through google-voice to skype, which will ring on your phone like normal. (just dont plan on getting a Gear because so far I've found NO way to accept/place skype calls using the gear)

Follow up that has fixed my issue with WFC after the 5.01 update on my Note 4.
Contacted Sprint via Chat.
updated Profile and PRL under system update in settings.
Pulled the battery for 30 sec and restarted. Turned on location and updated E911 settings and I'm back up and going.

Update:
For the last two days I've had no issues with wifi calling except when I went to town (where I dont need it anyway) it even reconnected and worked when I got back home. Dont know if it was a fluke or I've just been lucky, but it seems to have stabilized for me (at least for now) will report back it if acts up again.

UPDATE 2:
welp, looks like I jinxed myself. not been able to use wifi calling all day now...
Noticed a pattern though, last time it did this was when it rained, I wonder if wifi calling requires the GPS to be connected so rain kills it. (or it might be a coincidence, just something to think about)

cody_cummins said:
It was fixed, now its doing it again, I bet its this sweet modem that im renting from Comcast, what a joke of a company
Click to expand...
Click to collapse
Don't rent modems from the cable company. Usually its a cheap piece of crap. For what they charge you to rent the modem you can buy one on anazin/newegg and it'll pay for itself in less then a year
Sent from my SM-N910P using XDA Free mobile app

WiFi Calling dropping calls...

Ok, it seems for me the issue with wifi calling not working at all is resolved (I always have the "Wifi calling is ready!" notification) but when I receive a WiFi call it will randomly disconnect after a few minutes. Might be 5 min, might be 20, and after that if I or they call back it might disconnect in as little as 2-3 minutes! Doesn't seem to matter if I answer on my handset or my GearS, still always drops in <20 min.
It's not my internet connection dropping, I also have Skype with In/Out running and can place/receive calls on it without any interruptions (on both my N4 and my PC).
Any suggestions?
Phone is 100% stock, not rooted, Android 4.4.4.

Wi-Fi calling was a PITA on KitKat with my Netgear router. Netgear support and DD-WRT forums for my router were both saying to disable the firewall. Forward porting and setting my phone as DMZ with static address didn't help with UDP packets and maintaining a connection.
Lollipop its better and the reason I'm not going back to KitKat but hardly tolerable without root.
I know this doesn't apply to you but with Adaway, I monitored the DNS requests for Wi-Fi calling and whitelisted them. That seemed to help with the Wi-Fi connection list issues. There's webservicesgateway and vowifi dns requests to look for. Didn't post for security concerns.

Yeah, I'm scared to make the jump to lollipop because right now my GearS is working perfectly and I'm scared to change anything major (spent 2 weeks fighting in on the "compatible" SGN2, finally said "screw it, I'm due for an upgrade" and got the SGN4) as Is aid I've not even rooted my SGN4 for fear of 'breaking' my smartwatch...
Router could be the issue, since it's a brand I've never heard of before ("ComTrend") but It's a router/modem combination that my ISP requires so I cant swap it out... may try the suggestions you mentioned, just in case, but not going to hold my breath...
If anyone else has suggestions, please post them. Right now I'm in a situation where I need VoIP (I literally get 0-1 bars reception, so bad that if I answer a call it drops) and to get Skype to work I have to turn off calls comming to my handset (otherwise the Phone App overtakes skype, then drops the instant I answer) which means I miss calls when NOT at home thanks to skype playing poorly with my cellular data... >.<

Off topic: did you consider asking Sprint for an Airave unit? Bad cell signal.
Mine was free to use and got exchanged/upgraded for newer model a couple of times.
I let mine go with Wi-Fi calling because it conflicts. Had to pick one.

I've had two actually. Back when it was amde by Samsung it worked GREAT, (thought they charged me soemthing like $5/month for it) but now the new "Airvana" version has stopped getting a GPS signal... why I cant program it in I dont get (since WiFi calling works with out constant GPS) It's been sitting around gathering dust for a while, I might get it out and try to make it work again, maybe they upgraded their system enough that it wont turn off... or maybe I'll try sticking it in the attic or something... thanks for the suggestion!

Difference between Smart Switch and Wifi Calling....and performance questions

I've read (and THINK I understand) what smart switch is supposed to do (going all the way back to the Note4.
And it seems like the complete opposite of what wifi calling does.
Anyone care to explain the difference or real reasons one is used over the other?
Also on a related note, in the developer options category there is an option to turn on "Aggressive Wi-Fi cell h.."
With the explanation "switch from wifi to mobile networks more quickly when wifi signal is weak"
Kind of self explanatory and my question would be real work use. If you have unlimited data, any reason you would NOT want to check this?
Unless this just sounds great, but doesn't work well......
Thoughts?

vtcats said:
I've read (and THINK I understand) what smart switch is supposed to do (going all the way back to the Note4.
And it seems like the complete opposite of what wifi calling does.
Anyone care to explain the difference or real reasons one is used over the other?
Also on a related note, in the developer options category there is an option to turn on "Aggressive Wi-Fi cell h.."
With the explanation "switch from wifi to mobile networks more quickly when wifi signal is weak"
Kind of self explanatory and my question would be real work use. If you have unlimited data, any reason you would NOT want to check this?
Unless this just sounds great, but doesn't work well......
Thoughts?
Click to expand...
Click to collapse
Smart switch imports the data from your old phone when you switch to a Samsung phone; WiFi calling routes voice traffic over WiFi when available.

Sorry, I meant to say Smart NETWORK Switch. It says your phone will be connected to a mobile network if Wifi becomes unstable.
And Wi-fi calling kinda of says the exact opposite. If mobile becomes unstable, it will switch to Wifi......
Anyone?

Many times.. even when the wifi signal is weak, as long as wifi is turned on, the phone will remain connected to it. This especially happens when you are just pulling out of your house and you are trying to get to google maps for directions or something.. but because the phone is still connected to your home wifi, it'll remain so and since the connection is weak, you won't be able to browse or anything and google maps may say "no network connection".
I believe what Smart Network Switch does, is that in such cases, it'll immediately switch to mobile data.

androidbuff123 said:
Many times.. even when the wifi signal is weak, as long as wifi is turned on, the phone will remain connected to it. This especially happens when you are just pulling out of your house and you are trying to get to google maps for directions or something.. but because the phone is still connected to your home wifi, it'll remain so and since the connection is weak, you won't be able to browse or anything and google maps may say "no network connection".
I believe what Smart Network Switch does, is that in such cases, it'll immediately switch to mobile data.
Click to expand...
Click to collapse
This happens to me every morning in my driveway trying to route Waze. I get a weak wifi signal that the phone hangs onto and I get a no network error from Waze.