Hi!
For some reason, default APN settings are not working to everyone, so, I decided to publish the settings in this section, where most of complains/requests are.
First Check if you settings are this way. If not, do that:
1. Create new Access Point Name and call it Tether(it can be any name)
2. Goto Settings > Wireless & Networks > Mobile Networks >Access Point Names > Press left icon and select 'New APN'
3. Set this:
Let others fields empty and set this APN:
Name: Tether
APN: isp.apn
MCC: 302
MNC: 720
APN type: dun
4. Save the settings.
5. Enjoy!
Let me know if worked. If so, it may help more people if become a sticky thread, so, rate the thread and recommend it. :good:
The purpose of this thread is to provide useful and reliable information I gathered on internet, if it do not work and you found a way to run it, let me know so I can change the OP and share your findings.
Cheers
Here are the APN settings that are working for me. There are 3 different one that I have running.
#1 Data
Name: Rogers
APN: internet.com
Password: wap
MCC: 302
MNC: 720
APN Type: default,supl
#2 MMS
Name: Rogers MMS
APN: media.com
Username: media
Password: mda01
Server: 172.25.0.107
MMSC: http://mms.gprs.rogers.com
MMS Proxy: 10.128.1.69
MMS Port: 80
MCC: 302
MNC: 720
APN TYPE: mms
#3 Tethering
Name: Rogers Tethering
APN: isp.apn
MCC: 302
MNC: 720
APN TYPE: dun
All other values should be left blank/not set/ unspecified.
I have used the tethering apn and confirmed that it works for Wireless and Wired tethering using the stock Tethering and Mobile Hotspot feature from the Settings menu. These were tested on the newest RetailBR ICS leak from the development section found by pedrotorresfilho.
I have found these through various searches on Google and tested what works for me. Credits to the original posters and websites.
evonc said:
Here are the APN settings that are working for me. There are 3 different one that I have running.
#1 Data
Name: Rogers
APN: internet.com
Password: wap
MCC: 302
MNC: 720
APN Type: default,supl
#2 MMS
Name: Rogers MMS
APN: media.com
Username: media
Password: mda01
Server: 172.25.0.107
MMSC: http://mms.gprs.rogers.com
MMS Proxy: 10.128.1.69
MMS Port: 80
MCC: 302
MNC: 720
APN TYPE: mms
#3 Tethering
Name: Rogers Tethering
APN: isp.apn
MCC: 302
MNC: 720
APN TYPE: dun
All other values should be left blank/not set/ unspecified.
I have used the tethering apn and confirmed that it works for Wireless and Wired tethering using the stock Tethering and Mobile Hotspot feature from the Settings menu.
I have found these through various searches on Google and tested what works for me. Credits to the original posters and websites.
Click to expand...
Click to collapse
Thanks man! An OP update isn't needed this way. Guys only need follow your settings. :good:
Cheers
evonc said:
Here are the APN settings that are working for me. There are 3 different one that I have running.
#1 Data
Name: Rogers
APN: internet.com
Password: wap
MCC: 302
MNC: 720
APN Type: default,supl
#2 MMS
Name: Rogers MMS
APN: media.com
Username: media
Password: mda01
Server: 172.25.0.107
MMSC: http://mms.gprs.rogers.com
MMS Proxy: 10.128.1.69
MMS Port: 80
MCC: 302
MNC: 720
APN TYPE: mms
#3 Tethering
Name: Rogers Tethering
APN: isp.apn
MCC: 302
MNC: 720
APN TYPE: dun
All other values should be left blank/not set/ unspecified.
I have used the tethering apn and confirmed that it works for Wireless and Wired tethering using the stock Tethering and Mobile Hotspot feature from the Settings menu. These were tested on the newest RetailBR ICS leak from the development section found by pedrotorresfilho.
I have found these through various searches on Google and tested what works for me. Credits to the original posters and websites.
Click to expand...
Click to collapse
Thanks man. My internet is working now! Major thanks!
sorry for the dumb question, but i cannot seem to figure out how to use this information. Is this something i change in my hotspot settings in wifi tether?
:highfive:
Thanks for this setting
"Access Point Names" is grayed out,ideas??
just add dun in default apn setting
example
APN TYPE: default,dun
pedrotorresfilho said:
Hi!
For some reason, default APN settings are not working to everyone, so, I decided to publish the settings in this section, where most of complains/requests are.
First Check if you settings are this way. If not, do that:
1. Create new Access Point Name and call it Tether(it can be any name)
2. Goto Settings > Wireless & Networks > Mobile Networks >Access Point Names > Press left icon and select 'New APN'
3. Set this:
Let others fields empty and set this APN:
Name: Tether
APN: isp.apn
MCC: 302
MNC: 720
APN type: dun
4. Save the settings.
5. Enjoy!
Let me know if worked. If so, it may help more people if become a sticky thread, so, rate the thread and recommend it. :good:
The purpose of this thread is to provide useful and reliable information I gathered on internet, if it do not work and you found a way to run it, let me know so I can change the OP and share your findings.
Cheers
Click to expand...
Click to collapse
Pedro,
Are you using a GSM network or a CDMA network? I'll bet it's GSM, since you're not in the USA. On a CDMA network (such as Verizon) there seems to be no APN to edit. At least on my phone, the options for APN and Network Operator are greyed out. Any suggestions?
This device had no problem getting on AT&T right out of the box. If someone wants to include APN settings for other carriers in this thread, please feel free to. I'll get it started.
EDIT: Under the condition that this is a repost... Cyber slap the crap out of me.... and delete or merge.
AT&T
Name - AT&T PTA
APN - PTA
Proxy - Not Set
Port - Not Set
Username - Not Set
Password - Not Set
Server - Not Set
MMSC - http://mmsc.mobile.att.net
MMS Proxy - proxy.mobile.att.net
MMS Port - 80
MSM Protocol - WAP 2.0
MCC - 310
MNC - 410
Authentication Type - Not Set
APN Type - default,admin.fota,mms,supl,hipri
APN Enable/Disable - checked
Bearer - Unspecified
You can also follow this thread for testing APNs: http://forum.xda-developers.com/showthread.php?t=1791526
3UK (great for traveling to London and other areas I presume... mainly used it for data)
They won't copy and paste right so go here http://www.usgalaxys3.com/gsm-devel...us-samsung-galaxy-siii-t-t-mobile.html#post47 or to 3UKs site.
Orange France (great prepaid for France... mainly used it for data)
Name: orange
APN: orange
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: not set
MMS Proxy: not set
MMS Port: not set
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: default
Name: orange.acte
APN: orange.acte
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: http://mms.orange.fr
MMS Proxy: 192.168.010.200
MMS Port: 8080
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: mms
chrisngrod said:
This device had no problem getting on AT&T right out of the box. If someone wants to include APN settings for other carriers in this thread, please feel free to. I'll get it started.
EDIT: Under the condition that this is a repost... Cyber slap the crap out of me.... and delete or merge.
AT&T
Name - AT&T PTA
APN - PTA
Proxy - Not Set
Port - Not Set
Username - Not Set
Password - Not Set
Server - Not Set
MMSC - http://mmsc.mobile.att.net
MMS Proxy - proxy.mobile.att.net
MMS Port - 80
MSM Protocol - WAP 2.0
MCC - 310
MNC - 410
Authentication Type - Not Set
APN Type - default,admin.fota,mms,supl,hipri
APN Enable/Disable - checked
Bearer - Unspecified
3UK (great for traveling to London and other areas I presume... mainly used it for data)
They won't copy and paste right so go here http://www.usgalaxys3.com/gsm-devel...us-samsung-galaxy-siii-t-t-mobile.html#post47 or to 3UKs site.
Orange France (great prepaid for France... mainly used it for data)
Name: orange
APN: orange
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: not set
MMS Proxy: not set
MMS Port: not set
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: default
Name: orange.acte
APN: orange.acte
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: http://mms.orange.fr
MMS Proxy: 192.168.010.200
MMS Port: 8080
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: mms
Click to expand...
Click to collapse
Hmm, this will be the next phone for me
Sent from my Desire HD using xda premium
chrisngrod said:
This device had no problem getting on AT&T right out of the box. If someone wants to include APN settings for other carriers in this thread, please feel free to. I'll get it started.
EDIT: Under the condition that this is a repost... Cyber slap the crap out of me.... and delete or merge.
AT&T
Name - AT&T PTA
APN - PTA
Proxy - Not Set
Port - Not Set
Username - Not Set
Password - Not Set
Server - Not Set
MMSC - http://mmsc.mobile.att.net
MMS Proxy - proxy.mobile.att.net
MMS Port - 80
MSM Protocol - WAP 2.0
MCC - 310
MNC - 410
Authentication Type - Not Set
APN Type - default,admin.fota,mms,supl,hipri
APN Enable/Disable - checked
Bearer - Unspecified
You can also follow this thread for testing APNs: http://forum.xda-developers.com/showthread.php?t=1791526
3UK (great for traveling to London and other areas I presume... mainly used it for data)
They won't copy and paste right so go here http://www.usgalaxys3.com/gsm-devel...us-samsung-galaxy-siii-t-t-mobile.html#post47 or to 3UKs site.
Orange France (great prepaid for France... mainly used it for data)
Name: orange
APN: orange
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: not set
MMS Proxy: not set
MMS Port: not set
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: default
Name: orange.acte
APN: orange.acte
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: http://mms.orange.fr
MMS Proxy: 192.168.010.200
MMS Port: 8080
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: mms
Click to expand...
Click to collapse
You said "right out of the box". Did you mean it comes unlocked to be used on GSM carriers?
y3kt said:
You said "right out of the box". Did you mean it comes unlocked to be used on GSM carriers?
Click to expand...
Click to collapse
Yes it is unlocked for GSM carriers. No unlocking process, no code, etc.
Can anyone get mms to work with these settings? I have Internet just fine but can't send mms or receive them
Also PTA doesn't work only phone
Has anyone gotten AT&T MMS to work? I can receive texts, I just can't receive any pics.
does that mean i can use it on other carriers without unlock the device? greatest thankness
Sent from my HTC Vision using xda premium
xuxindb said:
does that mean i can use it on other carriers without unlock the device? greatest thankness
Sent from my HTC Vision using xda premium
Click to expand...
Click to collapse
Yep, SIM unlock and bootloader unlock are 2 different things.
Sent from my HTC6435LVW using xda app-developers app
thats really cool,since i still cant buy it from my country.....
Sent from my HTC Vision using xda premium
05GT said:
Has anyone gotten AT&T MMS to work? I can receive texts, I just can't receive any pics.
Click to expand...
Click to collapse
I have someone working on an MMS app. Unfortunately they don't have much time these days. We always have MMS problems when flashing devices to Cricket. The app would work the same way as the one for the CDMA carriers.
I tested it with Solavei. It works, but the notifications with JB are off.
So you guys saying I can buy this phone from verizon then put my ATT sim in and everything will work, data ?
smashcz said:
So you guys saying I can buy this phone from verizon then put my ATT sim in and everything will work, data ?
Click to expand...
Click to collapse
You should get talk, text, data (HSPA, I think there are some questions about HSPA+, and LTE is a different band so you won't get that).
You'll have to enter the AT&T APN. I can send with GOsms and the MMSC entered in those settings. Still can't receive. That's why I have a friend working on that.
I usually work on CDMA stuff and have a normal 9/5. That's why I've left the door kind of open here.
can't get ATT APN to work
I am having trouble setting up my DNA to work on ATT data network. I put the micro sim from my iphone 4s in the DNA, changed the APN following op's settings but could never get mobile data connected. Making phone call is fine. Did I do anything wrong? Any input appreciated.
chrisngrod said:
This device had no problem getting on AT&T right out of the box. If someone wants to include APN settings for other carriers in this thread, please feel free to. I'll get it started.
EDIT: Under the condition that this is a repost... Cyber slap the crap out of me.... and delete or merge.
AT&T
Name - AT&T PTA
APN - PTA
Proxy - Not Set
Port - Not Set
Username - Not Set
Password - Not Set
Server - Not Set
MMSC - http://mmsc.mobile.att.net
MMS Proxy - proxy.mobile.att.net
MMS Port - 80
MSM Protocol - WAP 2.0
MCC - 310
MNC - 410
Authentication Type - Not Set
APN Type - default,admin.fota,mms,supl,hipri
APN Enable/Disable - checked
Bearer - Unspecified
You can also follow this thread for testing APNs: http://forum.xda-developers.com/showthread.php?t=1791526
3UK (great for traveling to London and other areas I presume... mainly used it for data)
They won't copy and paste right so go here http://www.usgalaxys3.com/gsm-devel...us-samsung-galaxy-siii-t-t-mobile.html#post47 or to 3UKs site.
Orange France (great prepaid for France... mainly used it for data)
Name: orange
APN: orange
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: not set
MMS Proxy: not set
MMS Port: not set
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: default
Name: orange.acte
APN: orange.acte
Proxy: not set
Port: not set
Username: orange
Password: orange
Server: not set
MMSC: http://mms.orange.fr
MMS Proxy: 192.168.010.200
MMS Port: 8080
MMS Protocol: wap 2.0
MCC: 208
MNC: 01
Authentication type: not set
APN Type: mms
Click to expand...
Click to collapse
I am able to receive mms with a Tmo sim. I have not changed any apn settings so no data yet.
I was able to just drop in a T-mo card and pick up data.. But as you'll know edge only. With brief moments of HSDPA when I'm assuming I was close enough to a tower that has been upgraded to the 1900 band. Well I decided to go to at&t and grab a sim to see if there was an improvement. I couldn't personally get any of the APN settings to work that were presented in the op and being that I'm new to anything gsm I've got no clue why: Lol.. Could it be a location thing? However I did find a setup that does indeed pickup data for me. Figured I'd share just in case there were others having the same issue. Keep in mind MMS is still hit and miss. I've had them go through out&in but it fails most of the time.
AT&T APN Settings
Internet Settings
APN: wap.cingular
Proxy: [Leave Blank]
Port: [Leave Blank]
Username: [email protected]
Password: CINGULAR1
MMS Settings
Server: [Leave Blank]MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MMS Protocol: [Leave Blank]
MCC: 310
MNC: 410
Oh btw... Source for the above apn settings... http://theunlockr.com/internet-mms-settings/
Since we all know there is an issue sending and receiving MMS, I do the bare minimum to get my AT&T SIM to work. I create a new APN and only change 3 lines.....
Under "Name" I put PTA
Under "APN" I put phone
Under "MMS Port" I put 8080 [more secure than port 80]
Leave everything else alone. Don't add your MMSC address, proxy or anything else.
Now save and you are good to go. I get HSDPA. Don't know if it's + or not, but I get the exact same speeds as I normally do with my AT&T phones.
EmericanX said:
I was able to just drop in a T-mo card and pick up data.. But as you'll know edge only. With brief moments of HSDPA when I'm assuming I was close enough to a tower that has been upgraded to the 1900 band. Well I decided to go to at&t and grab a sim to see if there was an improvement. I couldn't personally get any of the APN settings to work that were presented in the op and being that I'm new to anything gsm I've got no clue why: Lol.. Could it be a location thing? However I did find a setup that does indeed pickup data for me. Figured I'd share just in case there were others having the same issue. Keep in mind MMS is still hit and miss. I've had them go through out&in but it fails most of the time.
AT&T APN Settings
Internet Settings
APN: wap.cingular
Proxy: [Leave Blank]
Port: [Leave Blank]
Username: [email protected]
Password: CINGULAR1
MMS Settings
Server: [Leave Blank]MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MMS Protocol: [Leave Blank]
MCC: 310
MNC: 410
Oh btw... Source for the above apn settings... http://theunlockr.com/internet-mms-settings/
Click to expand...
Click to collapse
I personally tried exactly as you referenced... I got zilch! Lol.. my device would not grab data until I used the Cingular apn information. As far as the MMS you're exactly right. I tried numerous combination with no result. The few times it did go through seem to be a fluke. I just threw the Cingular apn settings up because I was able to grab data and hopefully it may help someone else that tried the simple apn settings to no avail... I'm going to order a Straight Talk sim this weekend and see how that goes as well. I've got a month prepaid for both T-Mobile and AT&T so I've got a little time to play around with everything.
Side note: man my family and friends thought I was a dork before now I've got a VZW Nex and GSM DNA that I'm carrying around all the time! Lol
Sent from my HTC6435LVW using Tapatalk 2
EmericanX said:
I personally tried exactly as you referenced... I got zilch! Lol.. my device would not grab data until I used the Cingular apn information. As far as the MMS you're exactly right. I tried numerous combination with no result. The few times it did go through seem to be a fluke. I just threw the Cingular apn settings up because I was able to grab data and hopefully it may help someone else that tried the simple apn settings to no avail... I'm going to order a Straight Talk sim this weekend and see how that goes as well. I've got a month prepaid for both T-Mobile and AT&T so I've got a little time to play around with everything.
Side note: man my family and friends thought I was a dork before now I've got a VZW Nex and GSM DNA that I'm carrying around all the time! Lol
Sent from my HTC6435LVW using Tapatalk 2
Click to expand...
Click to collapse
I guess my friend is nowhere to be found for the MMS app.
Anyways I think it has something to deal with the APN whitelist in the build.prop. Notice they don't allow for the mms APN. Does someone want to play with that as I don't have another carrier's SIM right now.
(ro.net.apnwhitelist=admin,ims,supl,verizon,verizon800)
chrisngrod said:
I guess my friend is nowhere to be found for the MMS app.
Anyways I think it has something to deal with the APN whitelist in the build.prop. Notice they don't allow for the mms APN. Does someone want to play with that as I don't have another carrier's SIM right now.
(ro.net.apnwhitelist=admin,ims,supl,verizon,verizon800)
Click to expand...
Click to collapse
I am willing to do whatever you need. I have the DNA Unlocked and Rooted on stock ROM. I have a valid AT&T and T-Mobile SIM card. However, I am coming from 5 years of iPhone hacking, so I would need to be handled with kid gloves.
Just let me know what you need done, or point me to a tutorial thread.
AIRBORNE!!!
Sent from my One X using Tapatalk 2
I just got my M8Pro 3G tablet from PiPo with default APN setup for using AT&T.
Name: ATT
APN: broadband
Proxy: Not Set
Port: Not Set
Username: [email protected]
Password: cingular1
Server: Not Set
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC: 310
MNC: 410
Authentication type: Not Set
APN Type: default,supl,mms
APN protocol - IPv4
APN enable/disable - APN enabled
Bearer – Unspecified
My problem is that it will only connect to the EDGE 2G network, which is way slow. The modem specs for this 3G tablet are as follows:
1. Standard SIM Card Slot
2. HSPA/WCDMA: 2100/900MHz
3. GSM/GPRS/EDGE Quad band: 850/900/1800/1900
4. Download maximum: 7.2Mbit/s
5. Upload maximum: 5.76Mbit/s
In working with AT&T Tech Support we find that the provisioning system can not ID the IMEI number. Therefore, no APN settings from AT&T.
I am thinking that if provisioning could be set up for some other similar tablet we might get this working properly. I have tried several APN setups but nothing will let me get beyond EDGE 2G.
Any help would be greatly appreciated.
I have a Verizon S4 phone that I am trying to use with T-Mobile. MMS works but not until after I have made a phone call. I have to do this every time I restart the phone. 4g and phone calls seem to be working fine without having to do anything to get those going.
I am set to Global Network Mode and have these APN Settings:
APN: fast.t-mobile.com
Proxy: Not set
Port: Not set
Username : Not set
Password: Not set
Server: Not set
MMSC: http: / /mms.msg.eng.t-mobile.com/mms/wapenc
MMS Proxy: Not set
MMS Port: 80
MMC: 310
MNC: 260
Authentication Type: Not set
APN Type: default,mms,supl
APN Protocol: IPv4/IPv6
APN roaming protocol: IPv4
Bearer: Unspecified
Mobile virtual network operator type: None
Does anyone have any ideas on how I can get mms to start working properly without having to remember to make a phone call first after every restart?
Hello!
I have found out a way to allow MMS messages to work on AT&T Go Phone Plans.
I have seen many posts regarding this issue, and many people seem to still have an issue even after it is marked resolved in the github threads.
Here is how i fixed it for my device :
**Device Used**
Huawei Honor 5X
Android 7.1.1 Lineage OS Nightly
KIW-L24
AT&T Prepaid Go Phone SIM
**Steps**
First, if you are using a custom ROM, or even the stock Huawei ROM, It is likely you need to configure your APN settings.
You may have APN's that downloaded automatically, or you can create a new one if none are there.
Here are the things you need to make sure are set in Settings > Data > Cellular Networks > Access Point Names:
Name: ATT Nextgenphone
APN: nxtgenphone
Proxy: none
Port: none
Username: none
Password: none
Server: none
MMSC: http://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS port: 80
MCC: 310
MNC: 410
Authentication Type: none
APN: default,mms,supl,nota,hipri
APN Protocol: IPv4/IPv6
APN Roaming Protocol: IPv4/IPv6
Bearer: Unspecified
MVNO Type: None
Next we need to configure some settings for Signal:
**SMS**
SMS Enabled
"Wifi Calling" Compatibility mode: ON
**Chats and Media**
When using Mobile Data: Images, Audio, Video
When using Wifi: "Images, Audio, Video"
**Reboot your phone and attempt to download an MMS Message**
You should now be able to use your AT&T Go Phone SIM and Signal with both other Signal Users and unencrypted with Non-Signal users!
thanks
the only changed that was required on my side (straight talk on at&t) was to change the MVNO and Bearer to none/unspecified.
I managed to get this working after reverting back to stock and then realizing the difference in default values for MVNO and Bearer. Would have saved me time if only I saw your post 2 days before I found the solution myself. +1
link
itsbentheboy said:
Hello!
I have found out a way to allow MMS messages to work on AT&T Go Phone Plans.
I have seen many posts regarding this issue, and many people seem to still have an issue even after it is marked resolved in the github threads.
Here is how i fixed it for my device :
**Device Used**
Huawei Honor 5X
Android 7.1.1 Lineage OS Nightly
KIW-L24
AT&T Prepaid Go Phone SIM
**Steps**
First, if you are using a custom ROM, or even the stock Huawei ROM, It is likely you need to configure your APN settings.
You may have APN's that downloaded automatically, or you can create a new one if none are there.
Here are the things you need to make sure are set in Settings > Data > Cellular Networks > Access Point Names:
Name: ATT Nextgenphone
APN: nxtgenphone
Proxy: none
Port: none
Username: none
Password: none
Server: none
MMSC: http://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS port: 80
MCC: 310
MNC: 410
Authentication Type: none
APN: default,mms,supl,nota,hipri
APN Protocol: IPv4/IPv6
APN Roaming Protocol: IPv4/IPv6
Bearer: Unspecified
MVNO Type: None
Next we need to configure some settings for Signal:
**SMS**
SMS Enabled
"Wifi Calling" Compatibility mode: ON
**Chats and Media**
When using Mobile Data: Images, Audio, Video
When using Wifi: "Images, Audio, Video"
**Reboot your phone and attempt to download an MMS Message**
You should now be able to use your AT&T Go Phone SIM and Signal with both other Signal Users and unencrypted with Non-Signal users!
Click to expand...
Click to collapse