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Captivate Wifi/3G data issue

Has anyone had a problem with the Captivate when in both WIFI and 3G coverage the phone will not download or open a webpage? If I shut off one or the other it works but if both are active it hangs up and doesnt download.

Is this by chance on an enterprise wifi access point? Such as one of those expensive cisco APs you find in schools and enterprise class networks? If so, there is currently a driver problem with the captivate connecting to it, but not trasnfering data. Whether the netwrok is encrypted or open doesnt seems to matter. Personally, I find this a bigger problem than the GPS issue. I had to use wifi static to manually set IP, subnet, etc. This is a workaround, not a fix.

jhannaman82 said:
Is this by chance on an enterprise wifi access point? Such as one of those expensive cisco APs you find in schools and enterprise class networks? If so, there is currently a driver problem with the captivate connecting to it, but not trasnfering data. Whether the netwrok is encrypted or open doesnt seems to matter. Personally, I find this a bigger problem than the GPS issue. I had to use wifi static to manually set IP, subnet, etc. This is a workaround, not a fix.
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Click to collapse
Hey, I think I'm running into this issue at my workplace (we definitely use those Cisco APs, I see them all around). I'm connected, I have an IP, but I can't browse anywhere.
Here's the weird thing though: I can connect to the company's wifi in any other building (I guess different APs?) than the one I'm in and wifi works fine. It's just the building my cubicle's in that doesn't work and it's infuriating!

well thats dumb.

I had that happen once since I bought the phone on launch. I restarted my phone and it went away.

I've had this problem as well, usually my phone switches to only wifi pretty quickly though, so I don't notice much. The phone acts like it is using the 3G connection because the arrows are both indicating data coming and going, but nothing actually happens unless only one or the other is on.

i need to check this at more places but at home i have a standard dlink dl-624 router with no security over comcast. i think my issue initially was because of the wifi sleep policy (see below) but now i am just getting really really slow speeds. pages seem to load slower than 3G....(i mean really cinemaxHD is showing last of the mohicans in pan and scan)....also the pages time out very very frequently.....
Anyone having problems check out the advanced setting for wifi. The phone has a WIFI sleep policy. my default setting was to disconnect from wifi after the screen locks. my screen locks after 30 seconds. so basically it always looking for my network. you can change it to never.

I want to reiterate our findings again. There are multiple threads on other forums concerning this as well. When it comes to wifi, the captivate has a major problem. DHCP does not work on enterprise networks. Period. It is a driver issue. The network can be open or using any form of encryption, the results are thr same. I had numerous software, hardware and network analyst tackling this issue all week in my department. It is related in part to most enterprise networks not using a default subnet mask of 255.255.255.0. There is a workaround, but it is not a fix. You can either set a static from your static pool of ip's in wifi settings, or, if u connect to multiple networks, use wifi static from the market to remember and apply seperate static configs accross multiple networks which is what were having to do currently. This affects all captivates, one which we consider a major problem with deploying this phone to our other users.
Sent from my SAMSUNG-SGH-I897 using XDA App

I had the same problem and this is how a turn around the problem when I'm connected but cannot browse.
-Use Wifi Static
- DNS from google 8.8.8.8,8.8.4.4
- switch to airplane mode
- activate wifi
- test my conection (open the browser and surf)
- switch to phone mode
Hope it help

floppy__ said:
I had the same problem and this is how a turn around the problem when I'm connected but cannot browse.
-Use Wifi Static
- DNS from google 8.8.8.8,8.8.4.4
- switch to airplane mode
- activate wifi
- test my conection (open the browser and surf)
- switch to phone mode
Hope it help
Click to expand...
Click to collapse
Did this, Wifi Static was being used previously to bypass dhcp, and it correctly assigned the IP settings, used the static I assigned from our static pool of addresses. Still no data transfer over Cisco APs at work.

jhannaman82 said:
Did this, Wifi Static was being used previously to bypass dhcp, and it correctly assigned the IP settings, used the static I assigned from our static pool of addresses. Still no data transfer over Cisco APs at work.
Click to expand...
Click to collapse
are you able to access a website thru his IP address? in this case it's a DNS problem, try the Google DNS 8.8.8.8 - 8.8.4.4

floppy__ said:
are you able to access a website thru his IP address? in this case it's a DNS problem, try the Google DNS 8.8.8.8 - 8.8.4.4
Click to expand...
Click to collapse
Its hit or miss really, seems the wifi radio stack locks up and stops responding according to our trace logs. yes i have tried both our internal DNS server's as well as googles. Everywhere else works perfectly. But at work with our Cisco open (no security) APs, it doesnt work most of the time. Through whos ip address??? I have a static set from our static pool to make sure dhcp was not the culprit. Its def the device, and not my netwrok. I have over 100 of these APs deployed here.
Wifi works great everywhere else (at home with WPA2, etc). There is def a problem with enterprise cisco APs.

Netmask issue and cisco AP's
Posted this over in development thread.
http://forum.xda-developers.com/showpost.php?p=7698066&postcount=410
Make sure your netmask is correct.

Thanks jhannaman82
I just wanted to give a big thanks to jhannaman82 for posting his company's findings with these wifi issues. My wifi works 100% at home on my linksys tomato router (of course, with a netmask 255.255.255.0). But on my college campus they use an enterprise router setup with 255.255.0.0 and I have been going NUTS trying to figure out if it is my captivate or the network.
I can sometimes get a few minutes of working connection, but it always seems to crap out within 1 or 2 minutes.
I will attempt to fiddle around with switching the dhcp to static IP, and will post my results. Thanks!
edit: no luck with static IP fiddling so far. from my laptop (connected wirelessly), I gathered that the netmask is actually 255.255.248.0... when I set my captivate's netmask to anything other than 255.255.0.0, it does not connect. It says "connected" when I set the netmask to 255.255.0.0, but as usual no data will transfer (it seems). I'm at a loss. *shrug* Hopefully there's a driver update or something.

Thanks jhannaman82!
I just wrote a script with the GScript app: "ifconfig eth0 netmask 255.255.255.0", and have a shortcut on homescreen. The problem was that the netmask was wrongly set to 255.255.0.0 on my office wifi. Now all I need to do is tap on this shortcut at office, and the connection works!

Has anyone contacted Samsung about this ?

I'm hoping this gets fixed soon... This refuses to stay connected at my school. Huge pain.
I entered in an IP address and 255.255.252.0 for my netmask after seeing what it was on my computer and turn on flight mode and tested the wifi and now it's working. I'm not sure if it's just one of those fluke connections that I get... but we'll see.

[Q] How to set a fixed IP address

How to set a fixed IP address

Go to your WiFi settings. Where you have your list of WiFi networks, push and hold the network you want to have static IP on. After a second or two, a dialogue comes up where you can Forget network or Modify network. Select Modify Network. In the settings you have one that is called "IP settings", currently configured to DHCP. Select static in that menu and then you will be able to fill in all the details for your static address (IP, Netmask, Gateway, DNS servers, Netmask). Note, the netmask is called Network prefix length and you specify how many bits that are locked rather than the normal "255.255.255.0" syntax.

thanks, man
Sent from my MB860 using XDA App

bithir said:
Go to your WiFi settings. Where you have your list of WiFi networks, push and hold the network you want to have static IP on. After a second or two, a dialogue comes up where you can Forget network or Modify network. Select Modify Network. In the settings you have one that is called "IP settings", currently configured to DHCP. Select static in that menu and then you will be able to fill in all the details for your static address (IP, Netmask, Gateway, DNS servers, Netmask). Note, the netmask is called Network prefix length and you specify how many bits that are locked rather than the normal "255.255.255.0" syntax.
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Click to collapse
I have a vibrant T959 and was wondering if I set it to have a static IP address, what else does it affect on the workings of the phone. I am using the phone to give me a wifi hotspot and then I am using the signal to send to my MoFi wireless router to give my FTA satellite reciever the internet but I don't want my IP to change evey time I turn off my wifi hotspot. My FTA reciever needs a constant IP address. Thanks for any help you can give me. I am new to a lot of this.

Thanks a lot, I just bought the eee Pad and in my way setting things..

IP address changer

Hi,
Could you send me link where I can download
App which can change IP address if exist?
Thanks

if you need to change the adress of your Wifi connection, simply go to your wifi settings, do a long press on the network and select "edit". Here you can change the IP Adress.

No, I need to configure manualy IP address because WIFI AP doesnt give IP addresses and I am not administrator of this AP and its company wifi.
Exist this program ?

you should be able to connect to the Wifi AP. Once done, it should either provide you with an IP via DHCP, or if this is indeed disabled as you say a zeroconf ip. If it's DHCP you don't seem to be able to modify the IP, but for zeroconf:
select the wifi network in your wifi setting, press and hold it, select "edit". Right under "proxy on/off" you should be able to edit your IP Adress, subnet mask and gateway adress as well as your DNS Servers.

Localhorst86 said:
you should be able to connect to the Wifi AP. Once done, it should either provide you with an IP via DHCP, or if this is indeed disabled as you say a zeroconf ip. If it's DHCP you don't seem to be able to modify the IP, but for zeroconf:
select the wifi network in your wifi setting, press and hold it, select "edit". Right under "proxy on/off" you should be able to edit your IP Adress, subnet mask and gateway adress as well as your DNS Servers.
Click to expand...
Click to collapse
Your advice it's nice bul****. If you are connected to wifi
you can allow only proxy server if you edit selected
wifi network and nothing else.
I ment program which allows me change ip address before
I log to wifi network.
I hope thats clear.

marek1 said:
Your advice it's nice bul****. If you are connected to wifi
you can allow only proxy server if you edit selected
wifi network and nothing else.
I ment program which allows me change ip address before
I log to wifi network.
I hope thats clear.
Click to expand...
Click to collapse
No its not clear man ...
Why you want to change the ip of your phone to a static one for all networks yoy log in...
When your phone finds the network you want to log in connect to the net providing the password ... then after connecting and not haviing an ip address, keep the name of the network pressed with your finger and there you can change the ip address..

Did you try this yourself?
colossus_r said:
When your phone finds the network you want to log in connect to the net providing the password ... then after connecting and not haviing an ip address, keep the name of the network pressed with your finger and there you can change the ip address..
Click to expand...
Click to collapse
Did you try this yourself, and it worked? If yes, I wonder big time because that's exactly what did not work for me and my HTC Radar at my home Wifi network: Without a DHCP server running on the Access Point (no need for, only static IP addresses in use) the phone did not connect, just hang for a minute or so and then timed out. Only after I activated a DHCP server to dish out an IP to the phone it connected.

colossus_r said:
No its not clear man ...
Why you want to change the ip of your phone to a static one for all networks yoy log in...
When your phone finds the network you want to log in connect to the net providing the password ... then after connecting and not haviing an ip address, keep the name of the network pressed with your finger and there you can change the ip address..
Click to expand...
Click to collapse
Well this should not work.
Did you test your solution, looks strange?

Ap exist and it's new
OK, go listen to my pray.
Now I am happy.
http://forum.xda-developers.com/showthread.php?p=25772667&posted=1#post25772667

colossus_r said:
No its not clear man ...
Why you want to change the ip of your phone to a static one for all networks yoy log in...
When your phone finds the network you want to log in connect to the net providing the password ... then after connecting and not haviing an ip address, keep the name of the network pressed with your finger and there you can change the ip address..
Click to expand...
Click to collapse
suppose(and this case is real in my case and applies to me..) u r not the admin of wifi router(u r nt connection owner) and u r in ur school and u want to connect to school wifi..but the router connects to only a limited set of ips..network admin has disabled dhcp server as in my ase..without preconfiguring the ip address before connection, u cant connect to ap..thats tragedy..dont think, oh i have never undergone such circumstances and ur network admin is a jack***..i know but i am helpless in this situation..all my classmates and my seniors are android device owners..so network admin doesn't change all settings just for helping a single person(at least in india..they ll ask u to use internet through library computers like dumbasses..)
THIS SUBSTANTIATES THE NECESSITY OF A FEATURE WHICH ALLOWS U TO SET A STATIC IP BEFORE LOGGING INTO ACCESS POINT..
also this feature helps to prevent all the little more work consuming process of logging into router, assigning static ip to ur device, and getting the static ip on device from router itself(but still thats DHCP only)..

Try Hotspot Switch IP. Is a free android app which allows you to change IP automatically by timer, remotely via web server, and also you can do it in app. Link: https://play.google.com/store/apps/details?id=hotspot.wifi.change.ip&pli=1

Problem with Wi-Fi on a MESH system

Hello everyone
I just installed a MESH system - Tenda MW6 (two nodes connected to the main router, dhcp is on the main router).
I'm having a problem with the LG v30 running stock 9.0
The phone connects fine to the wifi network, but 90% or the time there's no internet access, when all other devices are working fine.
Is there anything I can do to make it run properly?
Thanks
Sent from my LG-H930 using Tapatalk

UPDATE
it turns out that this happens only when u turn on the secondary node. If only the main node works, everything is fine
It seems that the phone keeps changing connection to the nodes causing this.
Any idea about a possible solution?

I'm still suffering from this issue
Any ideas maybe?

KamaL said:
I'm still suffering from this issue
Any ideas maybe?
Click to expand...
Click to collapse
Have you set the mesh network up properly??
You don't want to have them set to DHCP.. That is just foolish (not insulting you).
Allow me to explain it as simply as I can..
You don't want to have the access points set to dhcp whilst connected to your router or you'll run in to "double NATing" conflicts..
Give each of your mesh devices static IP if possible, and set the default gateway of your second node to the routers address (example: router IP 192.168.1.1 <---- that IP address will be set as the default gateway on your second node.
I assume you aren't bouncing both nodes off of one another right?? You should simply have both nodes set up as individual Access Points..
So like. Router-node1-router-node2.. And not router-node1-node2..
Hopefully that made sense. let me know how you go
****edit****: sorry I should have asked this first... Which pack do you have? 3pack or 5 pack?? And was your MAIN router one of the 3 Mesh Nodes?? Sorry about that. Once you provide that info. I can help you with your problem fairly easily

TheTecXpert said:
Have you set the mesh network up properly??
You don't want to have them set to DHCP.. That is just foolish (not insulting you).
Allow me to explain it as simply as I can..
You don't want to have the access points set to dhcp whilst connected to your router or you'll run in to "double NATing" conflicts..
Give each of your mesh devices static IP if possible, and set the default gateway of your second node to the routers address (example: router IP 192.168.1.1 <---- that IP address will be set as the default gateway on your second node.
I assume you aren't bouncing both nodes off of one another right?? You should simply have both nodes set up as individual Access Points..
So like. Router-node1-router-node2.. And not router-node1-node2..
Hopefully that made sense. let me know how you go
****edit****: sorry I should have asked this first... Which pack do you have? 3pack or 5 pack?? And was your MAIN router one of the 3 Mesh Nodes?? Sorry about that. Once you provide that info. I can help you with your problem fairly easily
Click to expand...
Click to collapse
The dhcp server is still on my main router and modem, I preferred that because the Tenda mw6 limited security settings. The Tenda are set as Bridge mode.
One node is connected with ethernet cable to the main router, and the second node is set in another room.
Does that answer the question?

KamaL said:
The dhcp server is still on my main router and modem, I preferred that because the Tenda mw6 limited security settings. The Tenda are set as Bridge mode.
One node is connected with ethernet cable to the main router, and the second node is set in another room.
Does that answer the question?
Click to expand...
Click to collapse
Yep..
Now.. Have you changed any any SSID settings?? One thing I want you to try is to hard reset the node that you're having the problem connecting to the internet with.. I assume you're using the APP to configure your network yes?

Assigning a static IP address to a phones hotspot

How can I assign a static IP address to my phones hotspot?
I use the hotspot on my Samsung M31 to connect my laptop running Windows 10 to the internet.
I also have Oracle's Virtual Box VM running a few test websites on the laptop on Ubuntu Server 22.04, which need a static IP address to access.
A few days back when I ran ipconfig at the Windows command prompt, it showed my wireless IP address as 192.168.166.135. Today, it show as 192.168.35.125. Meaning, all my sites are now broken. Is there a way to stop the hotspot from changing IP addresses?
Can someone please help?
Thanks,

normanscr said:
How can I assign a static IP address to my phones hotspot?
I use the hotspot on my Samsung M31 to connect my laptop running Windows 10 to the internet.
I also have Oracle's Virtual Box VM running a few test websites on the laptop on Ubuntu Server 22.04, which need a static IP address to access.
A few days back when I ran ipconfig at the Windows command prompt, it showed my wireless IP address as 192.168.166.135. Today, it show as 192.168.35.125. Meaning, all my sites are now broken. Is there a way to stop the hotspot from changing IP addresses?
Can someone please help?
Thanks,
Click to expand...
Click to collapse
I don't know the answer to your question directly as your situation is more complicated than is mine but I will try to help in so much as you can at least check what your current settings are.
My setup is only similar to yours in that I have apps (such as vysor & scrcpy) on Windows which are expecting a static IP address from my phone. However, where my setup differs from yours is I'm not using my phone as a hotspot - the router is assigning the IP addresses.
However, maybe what I've learned by randomizing my MAC address on each connection can help you - where I say maybe - as I your situation is using the phone as a hotspot and mine is passively accepting the IP address handed to the phone by the router.
In Android 11, the phone's Wi-Fi radio MAC address can be randomized per SSID, in which case the "address reservation" feature of most routers (often incorrectly called "static" IP addresses) won't work as intended. Worse, in Android 12, in Developer options, you can set a switch to randomize the Wi-Fi radio MAC address of the phone on every connection, regardless of the SSID.
Hence, you have to set the "static" IP address request in the phone itself, so that the router will respect that request for a static IP address.
(As an extra complexity, my SSID broadcast is hidden for privacy reasons (not for security - but privacy), which complicates things only a tiny bit as you have to turn off auto-reconnect for privacy.)
See the images below where maybe (but maybe not!) this information will help you track down why in your (hotspot) case, this static IP address requrest isn't being honored in your hotstpot setup.

normanscr said:
How can I assign a static IP address to my phones hotspot?
I use the hotspot on my Samsung M31 to connect my laptop running Windows 10 to the internet.
I also have Oracle's Virtual Box VM running a few test websites on the laptop on Ubuntu Server 22.04, which need a static IP address to access.
A few days back when I ran ipconfig at the Windows command prompt, it showed my wireless IP address as 192.168.166.135. Today, it show as 192.168.35.125. Meaning, all my sites are now broken. Is there a way to stop the hotspot from changing IP addresses?
Can someone please help?
Thanks,
Click to expand...
Click to collapse
Hi ,
if You are the lucky owner of a rooted phone you can try this:
How do I assign a permanent static IP address to hotspot in Android 10
I would like to assign a permanent static IP address to hotspot in Android 10 (Unofficial LineageOS 17.1 for Natrium by LuK1337, rooted with Magisk v20.3 and updated to Jan 11, 2020 build). Now whenever I turn on the hotspot, it assigns a...
forum.xda-developers.com

To assign a static IP address to your phone's hotspot:
Go to your phone's settings and find the hotspot or tethering settings.
Look for the option to set the IP address as "Static" or "Manual."
Enter the desired IP address, subnet mask, gateway, and DNS server information.
Save the settings and restart the hotspot.
For more details, you can check out https://1921681.mobi/192-168-100-1/. Hope this helps.