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Hello,
I've searched around the Epic 4G Touch forums as best I could, but sadly I couldn't find anything that was exactly this problem (although I found some interesting articles about wifi sleep time but they don't seem to apply). I'm experiencing an annoying issue where I can connect Wifi just fine, but if the phone is left for a small period of time (~10 minutes), wifi appears as if it's still connected, however it cannot send/receive data. When this happens, the wifi status says it's "connected", but there is no data connection. The only way to to get the data back is to turn off wifi, wait for 3/4G connection to initialize, then turn Wifi back on to refresh it...then it's fine again until I set the phone down again.
I had this problem on stock EL29, so I rooted and flashed Phantom Blazer ROM (very cool ROM, but I'm still experiencing the same issue). After reading the threads on here about wifi sleep times (apparently they're backwards with ICS roms), I've experimented with every setting, yet I still have the same issue--Wifi is fine as long as I'm using the phone, I set it down, after about 10 minutes pick it back up, says it's still connected, but no data connection.
has anybody experienced this problem with this phone? I'm about to unroot my phone/go back to factory so I can take it in to a Sprint store, the problem is they (trying not to be offensive) don't seem to know very much about this device. I thought I'd ask the pros before I return it, get an iPhone, and have to eat my words about how cool Android is vs. iPhone in front of all my friends. I'm hoping there's a reliable ROM or app that can resolve this vs. having to just replace the device!
Thanks for your help!
I'm not the only one
I'm not the only one with this problem:
edit: I can't post links to androidforums.com or anywhere else, but this same problem is all over the interwebs and nobody has a solution.
I'm sure it's not my router as my ASUS tablet/laptops/girlfriend's iPhone experiences no connectivity problems. I'm thinking this is a hardware problem with some of these devices. I will unroot/reset to factory tonight and let you know what happens.
What channel is your router on? And what type is it A/B/G/N?
This is s known TW ICS bug, most likely kernel related. Almost everyone is having this issue and there is no fix until Samsung decides to repair it. There are quite a few posts similar to this one. If you're using XDA's search function, it's not very good. Try using Google next time and search XDA that way.
Sent from my SPH-D710 using Xparent ICS Tapatalk 2
Hey guys, thanks for the response. Just before I unrooted/reset to factory I tried one last solution--download an app called "Wifi Fixer". It has resolved a lot of these problems. It's not 100%, but after testing it for a day so far, I've only had to manually refresh the connection once or twice. It's a lot better, even liveable, and I won't be resetting to factory afterall, at least not until Samsung provides an update. So if anyone is having the same problem, try Wifi Fixer, hopefully it gives you a similar level of success...I'm not super happy about having to run another background process all the time, but it doesn't seem to affect battery, and the fix it provides is worth it to me.
Cheers!
Huh - a couple of things. Noticed this problem crept back in FF18 and didn't know why until I went back and checked the wpa_supplicant.conf that I'm using. The line ap_scan=2 was missing; after adding it back in the signal strength is back to full and stable.
I'll bump the thread but it appears the config changes here still hold after all:
http://forum.xda-developers.com/showthread.php?t=1569348
This should also avoid having the WiFi fixer there as you can specify the country in wpa_supplicant.conf manually.
Thanks for looking in to this! A couple questions from a noob like me though:
When you say the problem crept back in FF18 ... what does that mean? Is that something that exists in the "stock" version of the Epic 4G touch from Sprint?
The manual config file tweaks you're describing ... is that something I can perform myself?
Basically I'm wondering if it's "safe" to revert to stock in order to get consistent wifi signal, or if it's something I'm experiencing because of the ROM I'm using.
Thanks!
so, I've read around here on the XDA forum about problems with wifi connectivity where we have full bars for wifi but they are gray and you are not getting out. many describe my situation but I've not seen any real solutions...
my problem is that I can connect to my wifi router without issue but then a random amount of time later, sometimes fairly quickly and sometimes it's hours later, I will pick up the phone and see full bars but they are gray and I'm not getting out. I can try opening a terminal window and pinging the gateway/dns servers and can't even reach the gateway.
things I have tried:
- turned off MAC filtering on the wifi AP
- switched from a 5 GHZ wifi on the AP to 2.4 GHZ net on the AP and vice versa
- manually set the phone wifi preference to one or the other (5 or 2.4)
- battery pull on the phone
- delete network settings for my AP and reconfigure
I have not yet tried a static IP config on the phone but I can easily try that... {edited to add} well, I tried static config and that didn't help at all...
one other tidbit of info, I have a work Blackberry with wifi and it never loses wifi connectivity so this is a problem unique to my Nexus.
I'm running Cyanogen 10.0.0-toro and no, I haven't tried a full wipe and reload yet.
thoughts or suggestions?
I'm not trying to threadjack here, but I just wanted to share my experiences.
I've been have the exact same thing happen to my phone (Nexus maguro). I've tried every JB rom I could find, several different kernels and my wifi eventually always goes grey on me. All network activities stop. I'm back on stock everything right now and it still happens.
It happens on my home wifi as well as work wifi.
I'm about to puttstock ICS on my phone and try that out for a couple days.
Anyway, good luck with your problems, i'm going to follow this thread in hopes you'll get a solution that may help me.
If I do figure anything out i'll post back.
jrmacarthur said:
I'm not trying to threadjack here, but I just wanted to share my experiences.
I've been have the exact same thing happen to my phone (Nexus maguro). I've tried every JB rom I could find, several different kernels and my wifi eventually always goes grey on me. All network activities stop. I'm back on stock everything right now and it still happens.
It happens on my home wifi as well as work wifi.
I'm about to puttstock ICS on my phone and try that out for a couple days.
Anyway, good luck with your problems, i'm going to follow this thread in hopes you'll get a solution that may help me.
If I do figure anything out i'll post back.
Click to expand...
Click to collapse
seems that this is a topic that has been posted on a bit over time with no real single culprit or fix. I'll post back if I figure anything out... I know in the Cyanogen thread, I saw info that stated that the MAC address of the phone was changing and I'm going to try and determine if that is happening to mine.
I have the same issue. Sometimes even when i pick up the phone, if i look fast enough i see that the Wi-Fi bars weren't even there! Thats only 1 out of 5 times though. The other time its usually just grey bars. Sometimes it actually will click back and they'll flash to blue and grey 2-3 times and then go solid blue. Then sometimes like you, they'll stay grey. I've tried everything too...reverting to stock, Different kernels, ROMs, routers, static IP, 2.4 or 5ghz, full auto mode. The only fix that makes it a little more reliable, is using Wi-Fi PM Fast. But even that, is not reliable. I'd say its about 50% reliable then, for a huge sacrfice in battery life. For me i've noticed this started to happen with 4.2. Before that i never had a problem. All other devices though no problem. My Nexus 7 is just fine. But the galaxy nexus, no matter what router or where i am, the Wi-Fi is totally unreliable. For me, it happens within 2 minutes that it will disconnect most times. Then 1 in 10 times it'll be fine for 10 hours.
In all honesty, i've given up. Just come to deal with it. Use mobile networks when i'm not needing to download. I can download files and stream music just fine too. If there is traffic going through, it never disconnects. But when its just sitting there without traffic, it disconnects, or, loses connection to google servers i should say.
well that's not good to hear...
I installed stock 4.0.4 a couple days ago and have not had my wifi go grey on me yet.
Sent from my Galaxy Nexus using Tapatalk 2
jrmacarthur said:
I installed stock 4.0.4 a couple days ago and have not had my wifi go grey on me yet.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
yeah, I love Cyanogen so not willing to go back to stock... waiting for them to finish 10.1 and I guess I'll see how it behaves then.
Hi all,
Just to say that I have the same problem. I have been upgraded from ICS to 4.2 and nothing had happened but I had to downgrade to 4.1.1 (AOKP Build 4) due to other issues and after that I started notice the WiFi problem.
At first I thought it was when the screen went off, but I has happened with screen on too. I have to turn WiFi off and the back on to connect properly again, very annoying.
As I said I started noticing this after I downgraded, but then again, I had used AOKP 4.1.1 before without this issue. I think that it is time to change my phone :/
tgeery said:
so, I've read around here on the XDA forum about problems with wifi connectivity where we have full bars for wifi but they are gray and you are not getting out. many describe my situation but I've not seen any real solutions...
my problem is that I can connect to my wifi router without issue but then a random amount of time later, sometimes fairly quickly and sometimes it's hours later, I will pick up the phone and see full bars but they are gray and I'm not getting out. I can try opening a terminal window and pinging the gateway/dns servers and can't even reach the gateway.
things I have tried:
- turned off MAC filtering on the wifi AP
- switched from a 5 GHZ wifi on the AP to 2.4 GHZ net on the AP and vice versa
- manually set the phone wifi preference to one or the other (5 or 2.4)
- battery pull on the phone
- delete network settings for my AP and reconfigure
I have not yet tried a static IP config on the phone but I can easily try that... {edited to add} well, I tried static config and that didn't help at all...
one other tidbit of info, I have a work Blackberry with wifi and it never loses wifi connectivity so this is a problem unique to my Nexus.
I'm running Cyanogen 10.0.0-toro and no, I haven't tried a full wipe and reload yet.
thoughts or suggestions?
Click to expand...
Click to collapse
I'm on Muzzy 4.2.2 and I'm currently having the same problem. It's not a new problem since I remember having it months ago (disabled my phone's WiFi because I kept missing emails and other notifications - grew tired of dealing with it). I thought it was my router, so I swapped it with a newer one recently, but it carried forward (old router was TRENDnet Draft N and the new one is ASUS RT-N66U).
I would like to know how to properly troubleshoot this problem.
I'm glad I didnt have to create a thread for this. I have been facing this problem quite a lot. I can confirm that WiFi works absolutely fine until 4.1.2, whether it is stock or CM10 (I havent tried the other ROMs yet). I have faced this problem only from 4.2. It still exists on 4.2.2. Happens on all the ROMs I have tried till now including CM10.1 nightly as well as the stock factory image.
When the phone is sleeping, it seems to lose WiFi connectivity and when woken up, the WiFi bars is grey though it is full. If I am very lucky, it will turn blue automatically. Most of the times, I have to switch WiFi off and back on for it to connect properly.
Anyone knows the root cause for this? In case this has been discussed in any other thread?
subhramani said:
I'm glad I didnt have to create a thread for this. I have been facing this problem quite a lot. I can confirm that WiFi works absolutely fine until 4.1.2, whether it is stock or CM10 (I havent tried the other ROMs yet). I have faced this problem only from 4.2. It still exists on 4.2.2. Happens on all the ROMs I have tried till now including CM10.1 nightly as well as the stock factory image.
When the phone is sleeping, it seems to lose WiFi connectivity and when woken up, the WiFi bars is grey though it is full. If I am very lucky, it will turn blue automatically. Most of the times, I have to switch WiFi off and back on for it to connect properly.
Anyone knows the root cause for this? In case this has been discussed in any other thread?
Click to expand...
Click to collapse
have you posted this information over in any of the threads where the developers are working such as Cyanogen in an effort to bring this issue to the forefront for more visibility?
I have had those wifi problems with every android version and rom I had on my GNex as far as I can remember.
Sometimes it will be able to reconnect but sometimes I have to disable and re-enable wifi to get it back.
I too thought that it might have been my crappy router as I have had multiple problems with it over the years (some Linksys router).
This is really annoying because it won't receive any e-mails until I randomly decide to have a look at my phone. :/
Fabur87 said:
I have had those wifi problems with every android version and rom I had on my GNex as far as I can remember.
Sometimes it will be able to reconnect but sometimes I have to disable and re-enable wifi to get it back.
I too thought that it might have been my crappy router as I have had multiple problems with it over the years (some Linksys router).
This is really annoying because it won't receive any e-mails until I randomly decide to have a look at my phone. :/
Click to expand...
Click to collapse
trust me, I understand your frustration... some days, I can go almost all day without loosing wifi data throughput and other days it won't last 10 minutes without going to gray bars.
unfortunately, no one is sharing any fixes which tells me that no one has a good handle on the problem.
Same issue for me on stock Android 4.2.2. Leave WiFi on overnight and when I wake up its connected to WiFi but gray bars...
Sent from my Galaxy Nexus using xda premium
The update to 4.2.2 drivers have fixed all WiFi issues for me. For the first time since 4.1 I can now use WiFi optimization now. And WiFi is fully reliable.
tgeery said:
so, I've read around here on the XDA forum about problems with wifi connectivity where we have full bars for wifi but they are gray and you are not getting out. many describe my situation but I've not seen any real solutions...
my problem is that I can connect to my wifi router without issue but then a random amount of time later, sometimes fairly quickly and sometimes it's hours later, I will pick up the phone and see full bars but they are gray and I'm not getting out. I can try opening a terminal window and pinging the gateway/dns servers and can't even reach the gateway.
things I have tried:
- turned off MAC filtering on the wifi AP
- switched from a 5 GHZ wifi on the AP to 2.4 GHZ net on the AP and vice versa
- manually set the phone wifi preference to one or the other (5 or 2.4)
- battery pull on the phone
- delete network settings for my AP and reconfigure
I have not yet tried a static IP config on the phone but I can easily try that... {edited to add} well, I tried static config and that didn't help at all...
one other tidbit of info, I have a work Blackberry with wifi and it never loses wifi connectivity so this is a problem unique to my Nexus.
I'm running Cyanogen 10.0.0-toro and no, I haven't tried a full wipe and reload yet.
thoughts or suggestions?
Click to expand...
Click to collapse
same thing happened to me on toroplus sourcery 5.1, after trying everything i could think of and talking to one of the devs, i finally did a fresh download of rom and gapps. wiped cache,wiped dalvik, factory reset, wipe system, deleted android folder off of storage then installed the fresh download of rom and gapps and its been working great for me since. hope this helps.
M3drvr said:
The update to 4.2.2 drivers have fixed all WiFi issues for me. For the first time since 4.1 I can now use WiFi optimization now. And WiFi is fully reliable.
Click to expand...
Click to collapse
Can you elaborate on this? I've flashed 5 different modems and still get this problem... it happens to my cell service bars, as well. Would love to know what the cause is.
aqcon said:
Can you elaborate on this? I've flashed 5 different modems and still get this problem... it happens to my cell service bars, as well. Would love to know what the cause is.
Click to expand...
Click to collapse
i just know ever since moving to a 4.2.2 kernel that has the 4.2.2 drivers my wifi has been stable. I know there was a post in the anarkia thread with the ak kernel that had the drivers. but i believe most any 4.2.2 kernel would have them implemented. i do have the newest bootloader and radio too. but i know as soon add i got the 4.2.2 drivers all issues were resolved wifi wise. of course i think if you have a 4.2.2 kennel you'll have them.
M3drvr said:
The update to 4.2.2 drivers have fixed all WiFi issues for me. For the first time since 4.1 I can now use WiFi optimization now. And WiFi is fully reliable.
Click to expand...
Click to collapse
I'm looking forward to that update - I've been watching the Cyanogen threads for when I think the 10.1 has matured enough to become my daily driver... good to know you've had positive results!
Temporary solution
me facing same issues , Solution would be to use an app called wifi fixer by zanish-g1 from the play store ...
it worked for me !! :good:
My stock T-Mobile G3 continues to give me weird issues. After I leave WiFi, I only able to make calls, but don't have any data, unless I reboot. It does not happen all the time, but often when I on WiFi for a while. I tried disabling WiFi Calling and it seemed to help. This morning the data was working as soon as I left home range. I tried reflashing the stock ROM and modem, but it didn't work.
Yeah, I have the same issues on stock...
Basically, I've stopped using Wifi Calling altogether. If I was on Wifi with it on and then left the Wifi area, I couldn't do anything, no calls, no texting, no data. Reboot would bring it back, but that was a pain.
Everything seemed okay with Wifi Calling off, but then I noticed that it would randomly not give me data when I left Wifi. As you said, reboot fixes it. It doesn't happen nearly as often as when I leave Wifi Calling on, so it's not too annoying to have to deal with it right now.
One question I have for you, did you do a full phone wipe after you upgraded to the latest OTA update? I've heard doing so helps with some of the strange quirks like this, but haven't taken the time to do so myself.
The whole point of me switching over to G3 from Nexus 5 was to get the WiFi calling feature. This blows completely. I'm still going to hold on to in, hoping they release new update in September.
As far as wiping, I've flashed the device so many times by now, I'm pretty sure I've done a full wipe at some point.
xxhaimbondxx said:
The whole point of me switching over to G3 from Nexus 5 was to get the WiFi calling feature. This blows completely. I'm still going to hold on to in, hoping they release new update in September.
As far as wiping, I've flashed the device so many times by now, I'm pretty sure I've done a full wipe at some point.
Click to expand...
Click to collapse
Ah, that sucks. I was hoping that wiping might solve my issue.
Well then, maybe contact T-mobile? If it's not a wide-spread issue (I've asked around here and haven't heard others with this exact problem until your post) then maybe there's a solution.
Hi everyone, I'd really appreciate any help anyone could give me in solving this problem...
I upgraded to MM a few weeks ago and at first had some odd WiFi issues where the phone would not connect, or stay connected very long. After about half a day of tearing my hair out, clearing my cache, and reinstalling apps it all seemed to "come good", and had been ok for a few weeks.
A few days ago, however, everything went bad again. Here is what is happening:
On my 2.4Ghz wifi network, when the phone is woken up using the power button or double tap, WiFi does not work. The phone reports that it is connected to WiFi, and (according to the Ping Tools app) has an IP address, but there is no connectivity to the outside world (or even to my router or NAS box). After about a minute or so, the connection magically "comes good" again, and the WiFi works normally. This is very frustrating as while the phone is asleep it has no IP connectivity so I don't get any notifications for email/messages etc. I have the default "yes" setting for the "Keep Wi-Fi on when screen is off" option BTW.
I have discovered that if I switch to the 5Ghz WiFi network on my router then I do not get this behaviour - the WiFi stays connected while the phone is asleep and there's not the same period of no connectivity when it wakes up. Unfortunately the 5Ghz network doesn't reach to the front of my house so this isn't a viable solution.
I have also found that the odd behaviour does not occur if I disable Bluetooth on the phone. Since I use Bluetooth audio in my car, it's a bit of a pain to disable/re-enable it but it's the workaround that I'm currently using.
The strange behaviour does not occur if I reboot the phone into Safe Mode... the WiFi stays connected while the phone is asleep, and 2.4Ghz WiFi works straight away when the phone is woken up. This seems to indicate that an app might be the culprit.
To try and diagnose this I have
- cleared the cache and rebooted a number of times, to no avail
- done a factory reset and reinstalled my apps from Google Play, but end up in the same (broken) state
- changed the default channel for 2.4Ghz WiFi on my router several times
So I'm at my wits end now. I guess I could do another factory reset and reinstall my apps manually, one by one, and see which one (if any) breaks things. But I'd like to to try and avoid this. Does anyone have any suggestions as to how to determine what could be causing the problem?
Phone is an H815 running Android 6.0, V20a-EUR-XX. Totally stock, locked bootloader.
Sorry for the lengthy post.
I have approximately the same thing. Switching Bluetooth doesn't help in my case. I had to wipe cache from within the phone to make it get better again.
One other thing was to throw away my aluminium bumper. Do you maybe have one ?
ChriKn said:
I have approximately the same thing. Switching Bluetooth doesn't help in my case. I had to wipe cache from within the phone to make it get better again.
One other thing was to throw away my aluminium bumper. Do you maybe have one ?
Click to expand...
Click to collapse
Oh, I got excited at your case suggestion as I got a new case a couple of weeks ago which does have an aluminium bumper. But I just took the case off and alas the problem remains.
Unfortunately clearing the cache doesn't work for me. I also found a setting under Backup and Reset to reset network options but this didn't help either.
Next step might be to reinstall the OS or try the repair option in LG Bridge. Unless anyone else has a better idea?
sladflob said:
Oh, I got excited at your case suggestion as I got a new case a couple of weeks ago which does have an aluminium bumper. But I just took the case off and alas the problem remains.
Unfortunately clearing the cache doesn't work for me. I also found a setting under Backup and Reset to reset network options but this didn't help either.
Next step might be to reinstall the OS or try the repair option in LG Bridge. Unless anyone else has a better idea?
Click to expand...
Click to collapse
Sorry :/ for me the bumper then cache clearing did it... New case on the way ^^ I wish you good luck!
sladflob said:
Hi everyone, I'd really appreciate any help anyone could give me in solving this problem...
I upgraded to MM a few weeks ago and at first had some odd WiFi issues where the phone would not connect, or stay connected very long. After about half a day of tearing my hair out, clearing my cache, and reinstalling apps it all seemed to "come good", and had been ok for a few weeks.
A few days ago, however, everything went bad again. Here is what is happening:
On my 2.4Ghz wifi network, when the phone is woken up using the power button or double tap, WiFi does not work. The phone reports that it is connected to WiFi, and (according to the Ping Tools app) has an IP address, but there is no connectivity to the outside world (or even to my router or NAS box). After about a minute or so, the connection magically "comes good" again, and the WiFi works normally. This is very frustrating as while the phone is asleep it has no IP connectivity so I don't get any notifications for email/messages etc. I have the default "yes" setting for the "Keep Wi-Fi on when screen is off" option BTW.
I have discovered that if I switch to the 5Ghz WiFi network on my router then I do not get this behaviour - the WiFi stays connected while the phone is asleep and there's not the same period of no connectivity when it wakes up. Unfortunately the 5Ghz network doesn't reach to the front of my house so this isn't a viable solution.
I have also found that the odd behaviour does not occur if I disable Bluetooth on the phone. Since I use Bluetooth audio in my car, it's a bit of a pain to disable/re-enable it but it's the workaround that I'm currently using.
The strange behaviour does not occur if I reboot the phone into Safe Mode... the WiFi stays connected while the phone is asleep, and 2.4Ghz WiFi works straight away when the phone is woken up. This seems to indicate that an app might be the culprit.
To try and diagnose this I have
- cleared the cache and rebooted a number of times, to no avail
- done a factory reset and reinstalled my apps from Google Play, but end up in the same (broken) state
- changed the default channel for 2.4Ghz WiFi on my router several times
So I'm at my wits end now. I guess I could do another factory reset and reinstall my apps manually, one by one, and see which one (if any) breaks things. But I'd like to to try and avoid this. Does anyone have any suggestions as to how to determine what could be causing the problem?
Phone is an H815 running Android 6.0, V20a-EUR-XX. Totally stock, locked bootloader.
Sorry for the lengthy post.
Click to expand...
Click to collapse
Tihs issu not MM specific exist on LP
Try another chanel (In router)and use only N 2.4 Ghz
But is see you try..
Go and use warranty.!!!
I think I've fixed it. I just started uninstalling apps and checking to see if the behaviour persisted after uninstalling each one. After uninstalling TuneIn Radio the WiFi started working with Bluetooth enabled again. I reinstalled all the apps that I uninstalled (including TuneIn) and everything seems to be working again. I doubt it had anything to do with TuneIn - just a weird interaction of who knows what. It's not terribly satisfying and I suspect it will happen again, but hopefully this thread will help someone who might have the same problem.
Hey guys. I'm having a very weird WiFi issue on my A520F.
Today the WiFi froze. It wouldn't turn off when I switched it off. After I while it turned off but took ages to turn it on again.
I factory reseted the device because I thought it was a software issue. It didn't work - after the first boot it was the same.
After a while after this, the WiFi started working again, but only for a period of time, then it would just freeze again for apparently no reason. Switching it off and on solves the issue for a while, then it freezes again saying that my WiFi is limited.
I can't take any logs since I'm not rooted (and don't have a PC to use ADB), and this is really scaring me since it happened out of nowhere. An hour before this started happening WiFi was working just fine.
I haven't installed anything unusual today, just connected for the first time on a new, but trusted, WiFi.
I've also reseted my WiFi router to its factory settings, thinking that it could be the issue, but the problem persisted. My Chromecast works just fine on the very same network.
Did this happened to anyone before? I've tried to root my phone a while back and, since it didn't worked out, I gave up and flashed the latest firmware from my country. This phone originally came with German firmware in it and I flashed it to a Brazilian one, which is the one I'm using and had no issues so far.
Can this be a hardware issue?
Thanks in advance!
So I guess I'll end up solving this on the weirdest way I can imagine.
After I posted I logged into my modem's settings and took a log at its logs. Seems that the moment this issue started to happen was near the time that the DNS server my modem was using started to fail.
I never thought that such a simple thing could mess this things like this. I mean, the DNS server is essential, but how that could freeze my phone's WiFi? Either way, I changed the DNS to Google's DNS and since then I haven't had any freeze or disconnetion. I'll test a bit more to see if the problem is gone.
Well, I do believe that I found the root of the problem.
As some of you may know, modems tend to stay on for a very long period of time (no one wants to lose internet connection, so we rarely reboot then), and for reasons I don't know (and as a tech support guy I've seen this happen A LOT) they freeze sometimes and only work again after being completely turned off and on.
Since the issue started again when I was messing with the modem settings (trying to change the DNS again to see if the problem would return), I decided to give my modem a few minutes of rest.
After that, I've powered it on again and went through the initial setup (my ISP provides an simple wizard when you first connect to the WiFi) and up until now I'm not having issues.
I'll wait a few more hours to report again, but so far so good.
So it seems that giving those things a few minutes rest every month or so isn't a bad thing at all.