Develop Bugs

GPRS Settings!

Hi! I Have an xda2s,i have brought this phone from UK and i want to use gprs settings from a network provider in india.But,unfortunately the network provider in india doesnt have any setting for ANY WINDOWS BASED MOBILES. IF i can give u setting for other phones,can u please create settings for my xda2s. The website of my network provider is http://www.spiceindia.com/gprs/gprs_main.shtml Here you can find setting for different phones.PLease let me know how can i use these settings. Thanks.
Nish

here try the attached pdf........ it's an example settings guide

Indian XDA 11s owner who's been able to use GPRS
hey, any xda iis owner from india who has been able to use GPRS successfully??? any network!
please share ur experiences - users from india about gprs on xda.....
anyone can provide me settings which work for hutch, airtel, bsnl, spice, etc????

Gprs india
Hai
I am using airtel india gprs for a long time
Thanks
S.Raja

Airtel gprs settings!
on which handset have u been using?
what settings have u been using for connecting and what plan do u use?
thanks in advance!

I've been using GPRS on my XDA 2s from Dolphin (MTNL Delhi). Setting it up is very easy, just input the APN (for Dolphin its "gprsmtnldel" and the user name/password. Don't input anything else like server address etc. It works like a dream!

@PappaDocta
How do you open the MMS Composer? I couldn't find it

mms composer
in the messages menu, click the inbox arrow and scroll for MMS inbox....there are 3 inbox....mms, msg and mail....in mms inbox select new and there ur............

GPRS and MMS Settings for MTNL
Hi all,
I had a tough time finding out the GPRS and MMS Settings for MTNL, New Delhi, India. I have finally found them and my Internet is working fine, I thought I might share them with you.
Here they are:
GPRS
APN: gprsmtnldel
Wap gateway: 172.16.31.10
User: mtnl
Password: mtnl123
Port: 9201
Homepage: http://localhost/home.wml
MMS
Server IP: http://172.16.31.136/mms/

Configure Device for WAP Access
1 Tap Start
2 Tap Settings
3 Tap Connections tab4.Tap connections icon
Now
1 Under My ISP, select Add a new modem connection
2 Enter a name for your connection: MTNL_GPRS
3 From the Select a modem drop down choose Cellular Line (GPRS)
4 Tap Next
5 In the text box labelled (Access point name) type in
for post-paid : gprsmtnldel
for pre-paid : gprsppsdel
6 Tap Next
7 Enter User name mtnl , Password mtnl123, Domain leave it as blank
8 Tap Finish
9 Do not change any thing else in the setting
10 Tap OK twice.
Now you Tap to manage existing connexions under My Work Network or My ISP ( that you have created above)i.e MTNL_GPRS.

Hi,
Does anyone have GPRS settings for HUTCH [ DELHI ] please?
My O2 mini s [ Wizard ] works on HUTCH ACCESS which costs 699-00 per month Rental.
I want to use this on Normal GPRS Plan [ rent Free..only charged for usage and downloads ]
It would be a great help.
Thanx In advance.
-jeasbe'
N Delhi

Anybody there who can explain how to set mms setting on Wizard. My GPRS settings are working fine.

GPRS windows mobile phones
I am using GPRS All networks india supports that.I am using o2 xda IIs with airtel and aircel successfully

Hi..
I am trying to connect my HTC WM6.5 based phone to internet via gprs. I have installed these settings.
Following Settings are under Modem settings. :
Connection name : MTNL GPRS
Access Point Name : gprsmtnldel
And Following settings under proxy -> wap proxy settings
Wap Server : 172.16.31.10
Port : 9201
Username : mtnl
Password : mtnl123
But cannot connect to the net. The phone tries for a while then shows "Could not connect due to unknown reasom"
Than I check for settings again, the password I entered had automatically changed to a 12 letter word.
Please help me configuring windows mobile.

hi
very coooooool pro make gprs configurtion

Cingular MEdiaNet Proxy

Somehow I can't get the MEdiaNet Proxy to work properly. I've configured my internet settings to what is widely available information.
_______________________________________
When I have IE configured as follows:
IE > Tools > Options > Connections > Select Network: WAP Network
I can't access the MEdiaNet homepage nor any other site on the web. Instead I get a return error that says: "The Requested Page can not be displayed."
_______________________________________
When I have IE configured as follows:
IE > Tools > Options > Connections > Select Network: The Internet
I can get access to the web (which is more important at this point) but still not the MEdiaNet homepage.
_______________________________________
The puzzling thing for me is that I didn't have this problem when I was under the unlocked T-Mobile ROM. Any help or insight is much appreciated.

proxy
I am not on cingular, but used to be a while back. this is what you should have.
gprs
APN: wap.cingular
username(CAPS): [email protected]
password: CINGULAR1
CONNECTS TO THE INTERNET
PROXY SET UP
connects from the INTERNET
to THE wap network
Wireless.cingular.com:80
make sure you deletet anyother proxy settings
in PIE tools/options/connections
choose wap network, try again auto detect on/off not sure.
that should work.

Yup. Those are my exact settings. I've checked it 100 times and still can't figure it out. Again, "THE INTERNET" works but the "WAP NETWORK" does not.
Something happened when I migrated to the HTC based rom. I'm wondering if there's a registry value that changes the way proxies are handled within wm5.

I had the same problem. Someone on howardforums.com told me to use 66.209.11.61:9201 as the proxy and to switch the proxy type from HTTP to WAP.
Worked like a champ (not sure why the normal settings don't work though).
Now if I could only get MMS to work...

Thanks for the tip! It works perfectly.
Just tested out my MMS settings to be sure that it was working. It is indeed working both for sending and receiving. Settings are as follows:
Go to messaging > MMS > Menu > Options > Account Settings > Menu > MMSC Settings
Create a new item:
Name: Cingular MMS (But you can call it anything you want)
MMSC URL: http://mmsc.cingular.com
WAP Gateway: wireless.cingular.com
Port: 80
Connect via: The Internet
Max Sending Size: 300k
WAP Version: WAP 2.0
Cheers

What most likely will break is if you use wifi or your AS connection. It seems the settings are backwards on this device. And if you get that working, it will alwasy try to use a gprs connection even when a wifi or as connection is available.
Kind of sucks!

Proxy while using WiFi
Because Cingular uses a proxy setting you will not be able to use the WiFi as stated in the post above. You really do not need the proxy settings in to access the internet. I have had many devices with WiFi and have disabled the proxy on all of them and have been able to access full internet. With the proxy set you will only be able to get to "pda" or tiny screen sites. Try it out and let me know if it works. I have been thinking of getting either the HTC version or the Samsung Blackjack. I would rather have this one becuase I would prefer the WiFi over the 3G.
What are you thoughts?

Cingular MEdia Net
Wow...there is a GOD.
I made it a goal to get MEdia Net working on my phone, afterall, I am paying $20 a month for it. Like other users, I could get to any website, but not MEdia Net. This also happened after I upgraded the ROM (to remove the T-Mobile branding). I tried all suggested settings for IE, GPRS, and Proxy all from the various forums - xda, hofo, Cingular FAQ, called Cingular tech support. Nothing was working. Tonight I was farting around and stumbled upon this thread. I tried the Proxy settings above, and still nothing. I made several other changes and here is what I have now...
IE: tools/options/connections
Unchecked - Automatically Detect Settings
"Select Network" - Work
GPRS:
Connects to: The Internet
Access Point: wap.cingular
User Name(CAPS): [email protected]
password(CAPS): CINGULAR1
Primary DNS: 66.209.11.61
Proxy:
Connects from: The Internet
Connects to: Work
Proxy (name: port): 66.209.11.61:9201
Type: WAP
I know just like everyone else that MEdia Net itself does not have much to offer, but it was pi$$ing me off that it was not working. Now that I have it working though, I understand that there is a newer version of MEdia Net out or something?

when i had the cingular 2.06 rom my mms limit was 600k. Since upgrading to XDAlive and having to manually enter the media net and mms setting i'm limited to 300k. did anyone else notice this

dabears05 said:
Wow...there is a GOD.
I made it a goal to get MEdia Net working on my phone, afterall, I am paying $20 a month for it. Like other users, I could get to any website, but not MEdia Net. This also happened after I upgraded the ROM (to remove the T-Mobile branding). I tried all suggested settings for IE, GPRS, and Proxy all from the various forums - xda, hofo, Cingular FAQ, called Cingular tech support. Nothing was working. Tonight I was farting around and stumbled upon this thread. I tried the Proxy settings above, and still nothing. I made several other changes and here is what I have now...
IE: tools/options/connections
Unchecked - Automatically Detect Settings
"Select Network" - Work
GPRS:
Connects to: The Internet
Access Point: wap.cingular
User Name(CAPS): [email protected]
password(CAPS): CINGULAR1
Primary DNS: 66.209.11.61
Proxy:
Connects from: The Internet
Connects to: Work
Proxy (name: port): 66.209.11.61:9201
Type: WAP
I know just like everyone else that MEdia Net itself does not have much to offer, but it was pi$$ing me off that it was not working. Now that I have it working though, I understand that there is a newer version of MEdia Net out or something?
Click to expand...
Click to collapse
I tried those settings but it still won't work?

philocity said:
Yup. Those are my exact settings. I've checked it 100 times and still can't figure it out. Again, "THE INTERNET" works but the "WAP NETWORK" does not.
Something happened when I migrated to the HTC based rom. I'm wondering if there's a registry value that changes the way proxies are handled within wm5.
Click to expand...
Click to collapse
Check the Wiki for the registry tweak to add 600k MMS. Involves changing one value and making one more.
I forgot the exact details (location of keys/values) off the top of my head but it involved changing SendDataLimit to 4 (or next number higher) and making SendData4 value = 614400 D_WORD(decimal)
Thats off memory...so double check the wiki.

Interesting here as too (have AT&T Wirless) and both MEdianet and Cellular Video were (apparently) removed with a cooked WM6.1 ROM...
Not really a biggie, but I wanted a 'morale victory'...to get both pages (URLs) to work with Mobile IE (without having to tweak/modify any connection settings..
Cellular video is: http://cingularvideo.cingular.com
Alternative MEdianet is http://infospace.com/infow.sbcw/
Because a I recently received a AT&T MEdianet email advising me of a lot of customization changes...and wanted to see what was up...
Both pages report: We are temporarily experiencing technical difficulites

NO MORE FREE Internet with T-Mobile WM6 Upgrade

I have installed the Beta when it was leaked out and installed the final release when it was leaked out and my internet worked with all of them. This morning however, the day T-Mobile officially released the upgrade, I noticed my internet and e-mail stopped working. I added the T-MobileWeb for $5.99 package to my plan a few months back when T-Mobile shut down free internet access in my area (Dallas, TX) and that allowed me unlimited internet access without having to pay for the T-Mobile Total Internet Add-on for $29.99.
I have tried every thing I can think of to troubleshoot the phone except for restoring back to factory settings. Is anyone else having the same issue as me? Maybe T-Mobile figured out that people are getting unlimited internet access on their phones with the T-MobileWeb package (which is only suppose to let you use T-Zones to access premium content, not use IE) and are now blocking it?
Any input would be great!
Posted Wednesday, May 9th at 2:51 PM CST

[*deleted*]

I had the same issue this morning with trying to access the Internet using my Hermes (the only reason I'm even viewing this forum is because I used to own a Dash). I am running LVWS WM6 upgrade and went back to default settings but stayed on WM6. I was also on the $5.99 plan. I upgraded to the $29.99 plan and after 1 hour of waiting, got access to the Internet and my work's Direct Push system. Looks like T-Mobile is really going after the free users.
Murad

I too have the Dash with the Official WM6 ROM installed. This morning there was no data connection. Have been using "The Internet" under Settings>Connections>GPRS>T-Mobile Data.
I still had the T-Zones proxy in there, so I changed the above setting to "WAP Network" and I can get Exchange mail, and IE, but NOT Pop mail accounts. (Remember, the Pop client itself does not allow for a "WAP Network" setting in the WM6 Official release).
Two out of three is not bad, but not a full solution.
Maybe if this persists, I'll have to revert to the WM6 Beta version, as that software had the WAP option in the Pop setup.
Anyone have any ideas?

But what I dont understand is why did it stop working today? I have been using the leaked final release for over 2 weeks and never had a problem, and now it doesnt seems to work.
I remember a while back I read a post (maybe on this site, dont remember) that talked about settings up a Proxy on the phone so that you could get internet access with the T-MobileWeb package, but I can't find that information anymore.
The last time ActiveSynch talked with the Exchange server was @ 1:59 AM this morning (5/9/2007)

WM6 GPRS Proxy Settings for tzones !
I upgraded to WM6 and these are the settings that work for me just fine, now I got to figure out how to get Windows Live to work
T-Mobile GPRS
Connects to: WAP Network
Access Point: wap.voicestream.com
User name: ______
Password: ______
Primary DNS: 0.0.0.0 (I used 216.155.165.50)
Secondary DNS: 0.0.0.0
IP Address: ______
Start>Settings>Connections>Proxy
T-Mobile Proxy
Connects from: WAP Network
Connects to: The Internet
Proxy (nameort): 216.155.165.50:8080
Type: HTTP
User name: ______
Password: ______
Start>Messaging>MMS>Menu>Options>Account Options>MMS>Menu>MMSC Settings
T-Mobile MMS
MMSC URL: http://216.155.174.84/servlets/mms
WAP Gateway: 215.155.165.50
Port: 8080
Connect Via: WAP Network
Max Sending Size: 300k
WAP Version: WAP 2.0
Preferences
Retrieve Immediately
Save Sent Messages
Allow Delivery Report
Allow Read Report
No. of Attempts: 3
Photo Resolution: Original Resolution
In addition to above these need to be set:
Start/Connections/Menu/Advanced
All should be set to Automatic
PIE/Menu/Tools/Options/Connections/
Auto Detect should be Checked
Select Network: WAP Network
1. With these setting you can switch automatically from GPRS to WIFI seamlessly.
2. At the Windows Media Mobile site, Windows Media Player will play streaming video.
3. You can also connect to T-Mobile Web (http:/wap.myvoicestream.com
4. You can send MMS or pictures via POP email
These setting will allow virtually everything to work with the $4.99/5.99 T-Mobile Web Plan. Using alternate setting can work for somethings but not all.
Adam
[email protected]

Yeah, just use the proxy and all is well.
Everytime TMob does this, people freak out.

I looked closer at my settings. I had actually set my Dash up exactly as you listed.
This has changed:
"In addition to above these need to be set:
Start/Connections/Menu/Advanced
All should be set to Automatic"
These WERE set to automatic, by myself before today. I have always set these to Autmatic since my MPx200. I just looked at them and now I have:
Internet Connection: T-Mobile Data
Work Connection: Automatic
WAP Connection: T-Mobile MMS
Secure WAP Connection: Automatic
Changed them back, and Voila!! Everything works except my Pop mail.
Looks like T-Mobile pinged us with a change?????? Hopefully they wont do it again......
Thanks for the fix, qwikndrty.
UPDATE: Just tried changing T-Mobile Data to "The Internet" again. 4:00pm Local time. ALL WORKS AGAIN. Dallas TX area. Who knows?!!!!

My settings under Start/Connections/Menu/Advanced were changed from Automatic too.
I just applied all of the settings above and still nothing :-( I'm going to call T-Mobile and say T-Zones doesnt work (even though it does) and everytime they do something to try and fix it I am just going to say it still isnt working. Maybe the guy will get tired of not being able to fix it and just change something to allow me to have internet access.

UPDATE: Just tried changing T-Mobile Data to "The Internet" again. ALL WORKS AGAIN. 4:00pm Local time. Dallas TX area. Who knows?!!!!
Is there a setting to stop T-Mobile changing things?

Wasnt there another address besides wap.voicestream.com that used to be be used? like wap.tmobileweb.com or something like that? I used to have an MDA and I remember there being a second address for one of the connections.

Anyone know how to log into Windows Live? Internet Explorer works fine tho.

tbdevil88 said:
Wasnt there another address besides wap.voicestream.com that used to be be used? like wap.tmobileweb.com or something like that? I used to have an MDA and I remember there being a second address for one of the connections.
Click to expand...
Click to collapse
wap.t-zones.com if it redirects you to t-mobilefavorites.co.uk, then its the uk site.

Anyone in Dallas, TX using a WM6 Dash with the $5.99 T-MobilWeb service on their account have internet access right now?
I have the $5.99 T-MobileWeb service on my plan (instead of paying for the $29.99 Unlimited Internet) and cannot access the internet anymore. Anyone else able to access it right now with the same setup as me?

No More Internet Via Tzones without proxy
I have the Tzones 5.99. And I too lost internet about 1:00 a.m., I am in Sacramento Cal. I had to use the proxy 216.155.165.50:8080 for Internet but no more Live Mail
Hermes WM6 Black 3.01

Mine went out this morning and I still can't get it back!! Cant use it with the proxy either!!!!

you guys make it sound like its the rom thats preventing internet from working...
truth of the matter is that tmobile has been upgrading and securing their network in the usa piece by piece to prevent data abuse...
with 3g coming out on their network soon, they're making a much better effort of giving proper privileges according to the plan a customer subscribes to...
no more free lunch...it's sad but true...check out howardforums and you'll see many discussions about this

qwikndrty said:
I upgraded to WM6 and these are the settings that work for me just fine, now I got to figure out how to get Windows Live to work
T-Mobile GPRS
Connects to: WAP Network
Access Point: wap.voicestream.com
User name: ______
Password: ______
Primary DNS: 0.0.0.0 (I used 216.155.165.50)
Secondary DNS: 0.0.0.0
IP Address: ______
Start>Settings>Connections>Proxy
T-Mobile Proxy
Connects from: WAP Network
Connects to: The Internet
Proxy (nameort): 216.155.165.50:8080
Type: HTTP
User name: ______
Password: ______
Start>Messaging>MMS>Menu>Options>Account Options>MMS>Menu>MMSC Settings
T-Mobile MMS
MMSC URL: http://216.155.174.84/servlets/mms
WAP Gateway: 215.155.165.50
Port: 8080
Connect Via: WAP Network
Max Sending Size: 300k
WAP Version: WAP 2.0
Preferences
Retrieve Immediately
Save Sent Messages
Allow Delivery Report
Allow Read Report
No. of Attempts: 3
Photo Resolution: Original Resolution
In addition to above these need to be set:
Start/Connections/Menu/Advanced
All should be set to Automatic
PIE/Menu/Tools/Options/Connections/
Auto Detect should be Checked
Select Network: WAP Network
1. With these setting you can switch automatically from GPRS to WIFI seamlessly.
2. At the Windows Media Mobile site, Windows Media Player will play streaming video.
3. You can also connect to T-Mobile Web (http:/wap.myvoicestream.com
4. You can send MMS or pictures via POP email
These setting will allow virtually everything to work with the $4.99/5.99 T-Mobile Web Plan. Using alternate setting can work for somethings but not all.
Adam
[email protected]
Click to expand...
Click to collapse
My first post and just wanted to say thanks. I bought my Dash over a week ago and have been getting free internet. Sometime yesterday they shut it down so I ordered the $5.99 package. I got a text message confirmation from them this morning that the new package was activated so I entered all the information above and I am now back up and running

Right now I can either get the internet and mail2web to work or I can have my pop mail work. If I use the proxy, internet/mail2web work w/o proxy I can get pop mail.
Pretty bizarre

kmattoo said:
Right now I can either get the internet and mail2web to work or I can have my pop mail work. If I use the proxy, internet/mail2web work w/o proxy I can get pop mail.
Pretty bizarre
Click to expand...
Click to collapse
Then all you have to do is set up a second GPRS setting:
T-Mobile Data2
Connects to: Work
Access Point: wap.voicestream.com
AND then, make one change with EACH Pop e-mail account:
Open your e-mail account, then Menu\Tools\Options\Account Settings\Next\Next\Next\Next\Advanced Server Settings\Network Connection
Change to: "Work"
This way you do not have to keep switching GPRS settings back and forth.

WM6 HSDPA settings

This forum has been a great help with setting up my new Trin100, dopod D810 version phone. I do have a couple of questions.
So right now this is what I have
ROM 2.0.8.1
Radio 1.46.00.11
My question has to do with the 3G / HSPDA setting for mobile 6. I am with FIDO in Canada and believe I have correctly set up the applicable settings.
In the settings tab / modem I have Fido with internet.fido.ca set for the number.
For modem I have Cellular Line (GPRS, 3G) set.
APN = internet.fido.ca
I have it set for “Use server-assigned IP address” and “Use server-assigned addresses” in the TCP/IP and Servers tabs respectively.
In the proxy settings tab I have internet.fido.ca set for proxy server.
In the advanced tab it shows.
HTTP internet.fido.ca:80
WAP http:0
Secure WAP
Socks internet.fido.ca:1080
Now it does show that it connects with the “H” icon just Explorer does not load the applicable pages. When I use Opera it seems to work fine.
Am I missing anything?
As well does anyone know if there is a way to limit or record data transfer, since the rates are so expensive with FIDO.

gadgetgoat said:
This forum has been a great help with setting up my new Trin100, dopod D810 version phone. I do have a couple of questions.
So right now this is what I have
ROM 2.0.8.1
Radio 1.46.00.11
My question has to do with the 3G / HSPDA setting for mobile 6. I am with FIDO in Canada and believe I have correctly set up the applicable settings.
In the settings tab / modem I have Fido with internet.fido.ca set for the number.
For modem I have Cellular Line (GPRS, 3G) set.
APN = internet.fido.ca
I have it set for “Use server-assigned IP address” and “Use server-assigned addresses” in the TCP/IP and Servers tabs respectively.
In the proxy settings tab I have internet.fido.ca set for proxy server.
In the advanced tab it shows.
HTTP internet.fido.ca:80
WAP http:0
Secure WAP
Socks internet.fido.ca:1080
Now it does show that it connects with the “H” icon just Explorer does not load the applicable pages. When I use Opera it seems to work fine.
Am I missing anything?
As well does anyone know if there is a way to limit or record data transfer, since the rates are so expensive with FIDO.
Click to expand...
Click to collapse
for usage control, you can try spb gprs monitor.

Ip Dashboard
Try IP Dashboard. It's better.

Thanks for the suggestions. IP Dashboard is cheaper, on the other hand I use other spb software now. Of course now I see how many threads there are for data trackers
Now I just have to get the setting correctly. Of course FIDO will not help since it is not a FIDO phone.
In addition to my above post, I can not send MMS messages as well?
I am sure I am missing something easy.

I did find this.... of course I still can not send MMS
1. go to Start-> Settings, choose the Connections tab, choose Connections, then click on the “add a new modem connection” link.
2. call the connection Fido/Rogers Internet, and selet the Modem as Cellular Line (GPRS). Press Next.
3. Access Point Name, internet.fido.ca if you are on Fido or internet.com if you are on Rogers. Press Next.
4. User name and password are fido/fido if you are on Fido, or wapuser1/wap if you are on Rogers. As for domain, 205.151.011.011 for Fido or 208.200.067.150 for Rogers. Press finish.
5. add another connection, and call the new one Fido/Rogers MMS, Cellular Line (GPRS) modem. Press next.
6. Access point name, mms.fido.ca if you are on oFido or media.com if you are on Rogers. Press next.
7. User name and password are fido/fido if you are on Fido, or media/mda01 for Rogers. As for domain, 205.151.011.013 for Fido or 172.025.000.107 for rogers. Press finish.
8. go to start -> Messaging, Tools menu on the bottom, MMS Settings.
9. in the preferences tab, connect via “my ISP.” Go to the servers tab.
10. press New, for Server Name type in Fido/Rogers MMS, Gateway 205.151.011.013 for fido or 172.025.000.107 for rogers, port number is 9201 for both, Server Address is http://mms.fido.ca for fido and http://media.com for Rogers. Press OK.
11. set the new account you’ve just set up as default, then delete the default account.
12. you’re done!

[Q] N7 LTE - no data with carrier - anything specific I need to configure?

Just got the N7 2013 LTE (August production date).
I took the AT&T SIM card from my Galaxy S4 Active and put it in the N7 for testing purposes. The icon for the "signal" is there, but....no data, no internet...
I went to Settings --> Wireless & networks --> Mobile Networks and did the following:
1). Data Enabled --> CHECKED
2). Access Point Names --> ATT Broadband CHECKED (I did not modify the APN, since I assume it's from the SIM card itself)
I then trying to add a NEW APN with settings as follow:
Name ATT
APN wap.cingular
Proxy blank
Username blank
Password blank
Server leave it blank
MMSC http://mmsc.cingular.com
MMS Proxy wirless.cingular.com
MMS Port 80
MCC 310
MNC 012
Authentication type not set
APN Type internet + mms
However, the moment I clicked on "Save", that new APN disappear. I just cannot add a new APN!
What am I doing wrong?

Anyone?

I don't know about AT&T but T-mobile blocks phone sims from working in tablets and data only sims from working in phones if they know what the device is. So, if Google is sharing IMEI numbers of their devices with the carriers, the carriers can block them from working on their networks in ways they don't want them to.