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Switching between WLAN & WWAN?

so I am curious if anyone has run into this issue (or if it's not an issue and rather it's just the way the phone behaves, perhaps someone can tell me if there is a workaround in settings?):
it seems to me that turning wifi on doesn't always make wifi the active connection. it's intermittent, but it appears to happen frequently.
I found out because I started to download some stuff out of my audiogalaxy collection (which REQUIRES wifi, it doesn't let you do it on mobile data) and it kept telling me to enable wifi to continue downloading.
speed tests confirmed that I was on mobile data, not wifi... even though wifi was turned on and connected.
I've also noticed that occasionally, you'll turn wifi on and it won't replace the mobile data icon... I imagine it's all related.
any of you guys encountering this or should I go get myself a replacement?

wifi fallback issue on SGH-i727????

Hi,
Just wonder if anybody is experiencing the same wifi fallback issue on the SGH-i727?
Basically, the phone doesn't automatically fall back to the previously added wifi network from LTE/4G when the screen is off. To get around that, I'll need to hit the power button once every time I enter the wifi range. When the screen is turned on by hitting the power button, I will see the 4G/LTE being replaced by the wifi icon very quickly. After that, it will then stay connected to the wifi network regardless whether the screen is on or off.
I was able to confirm this issue by monitoring the app traffic before and after I turned on the screen.
Without turning on the screen in the wifi range, the phone will stay on the 4g/LTE network forever even though the previously added wifi network is available.
I have already tried out different routers and it's still the same. SSID broadcast is on. I am thinking if there's a bug with the phone. Note that on my phone, my "Wi-Fi sleep policy" under the advanced menu of the "Wi-Fi settings" is always set to "never". Also, it's a stock ROM, nothing is modified at all.
This issue has never happened on other phones. What you think? Am I missing anything here?

After playing with it more, I noticed that the phone will never do the wifi handshake when the screen is off.
I tried turning off and on the wifi in the Wi-Fi settings. If I turn off the screen quickly before the phone gets connected to the wifi network again, it *will* remain unconnected until the screen is turned on again. =(

Did you go into the advanced wifi settings and change the wifi sleep policy?
Sent from my SAMSUNG-SGH-I727 using XDA App

No, I didn't. I've never touched that setting. The "Wi-Fi sleep policy" is always set to "never".
My phone can still be connected to wifi when the screen is off, so it doesn't seem related to the "Wi-Fi sleep policy". The problem is only that it won't do any wifi connection handshake during screen-off.
Am I the only one having this issue? I guess that's more of a software issue rather than a hardware issue?

Have you tried the AT&T wifi app? It automatically turns off and on wifi as needed

No, that doesn't help.

Yes, I do realize I'm bringing back a thread from the dead, but...
I just got a Samsung Stratosphere (SCH-i405 -- a CDMA-1X/EVDO/LTE Galaxy S phone) and it does EXACTLY the same thing. It's ironic, on the Stratosphere they added a bit of fun that CONSTANTLY lets you know there's networks (which I had to disable), but it doesn't connect to the wifi networks I do have in there until I turn on the screen I guess that's just how it is; at least it doesn't kill the wifi once it IS connected.
If anyone knows a programmatic way to bypass this, I'd be interested, and I could write up a wifi app to implement the solution. I'm guesisng it's a behavior of the drivers though and would take some custom ROM or something to fix.

You could always try to use tasker for automatically connecting to the wifi using radio antenna or maybe can't remember if possible by identifying certain wifi spot.

38R Wi-fi connection issue

Ever since my phone got the XNPH38R update I've been having an issue with wi-fi
If I connect to wifi it works fine but as soon as I lose the wifi signal it can't seem to reconnect to the same wifi without rebooting the phone. Its especially annoying when I walk to get the mail or come home from anywhere.
I've tried manually connecting to the wifi after being disconnected in the android wifi settings menu but it doesn't connect until I reboot my phone.
I'm running the 64GB oneplus one on t-mobile in the usa.
Any suggestions?

jkentj said:
Ever since my phone got the XNPH38R update I've been having an issue with wi-fi
If I connect to wifi it works fine but as soon as I lose the wifi signal it can't seem to reconnect to the same wifi without rebooting the phone. Its especially annoying when I walk to get the mail or come home from anywhere.
I've tried manually connecting to the wifi after being disconnected in the android wifi settings menu but it doesn't connect until I reboot my phone.
I'm running the 64GB oneplus one on t-mobile in the usa.
Any suggestions?
Click to expand...
Click to collapse
I've had this issue on CM, except it'd work when I manually connected back to the wifi - I believe it's an issue when the phone goes to sleep it's failing to resume wifi connections.
The only thing I could suggest is try downgrading back down, or doing a clean re-install, and reporting this issue on CM's jira, so they can fix it.
https://jira.cyanogenmod.org/
I'm on OMNI now, so I can't really help you out, but do try unticking that 'wifi optimization' option, or perhaps using a tasker profile to turn off and on wifi whenever the screen display turns off and on respectively (at the trade off of loosing connection, so you won't be able to download stuff while the phone's off).

i have the same problem..

[Q] wifi dead in 24hr

My rooted Nexus 5 ver4.4.3 suddenly has issue with wifi. In about 24 hr, wifi connection cannot be re-established. Even I turn off the wifi button in the setting I still see all the available wifi there. Close it and reopen the wifi setting, the wifi shows ON. It fails to connect any hotspot, encrypted or not. For any encrypted hotspot, it asks for password again and no password knows.
Only reboot correct the issue and I uninstalled several apps but condition remains.
will capturing bug report help? Should I wipe device clean? How can I do full application+data backup?

Android Wifi Calling issue

Hi,
I have noticed a strange behaviour using Wifi Calling. When I am away from home, and returning, it takes the phone about 15-20 mins for the wifi calling icon to show up and to be available. If I use airplane mode on/off it works instantly. I have seen this a few times on IOS as well, but seems more frequent on Android. So far tested on Samsung S22U and Sony Xperia 1 IV.
Also, today, while I was in a call, using VoWifi, the call dropped and when I looked immediately on the phone, vowifi icon was gone and it came back in a matter of 10 seconds.
Has anyone faced these issues and was able to narrow down the cause of it? My Wifi network does not have a firewall in place nor am I doing any sort of filtering. Changing between DNS servers makes no difference.

Turn off automatic WiFi network login on your phone and check again if it helped.

Hi, I do not have such option available. You mean wifi auto connect when in range?

Yes, because the phone can switch when the signal from the first router is weakening. (1)
Also, by setting up a manual connection, you can be sure that you are connecting to the router you want to connect to, not just any one. (2)

ze7zez said:
Yes, because the phone can switch when the signal from the first router is weakening. (1)
Also, by setting up a manual connection, you can be sure that you are connecting to the router you want to connect to, not just any one. (2)
Click to expand...
Click to collapse
So you're saying turn those 2 settings off? I just recently ran into this issue with my Wi-Fi conking out intermittently and I'm experiencing 20% battery loss over night. I'm thinking its bad hardware. I just turned off these settings. I'll report back if it helps.