3G SIM wont work - Galaxy Tab Q&A, Help & Troubleshooting

I have a question if anyone can help. I sold a tab to a guy on ebay with it able to call and text and get data from a regular cell phone SIM card on ATT. He got it and went to ATT to buy a month to month SIM card with just data on it and the tab wouldn't read it. Its running Overcome v2 which is old. If I instructed him to flash the stock ATT modem would that fix the problem of not reading a month to month data SIM, or would I need to go back to stock firmware?

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[Q] captivate on tmobile

I wanted to use a tmobile sim on my captivate, I know it won't get any 3g network but I can't even make phone calls or anything. The phone is unlocked and running fasty rom v2.0...any help?ideas?
Did you input tmo apn settings?
No but im not trying to get internet i just want to make calls
you turned off the phone , then put the tmobile sim card then turn it on . Make sure the sim card works and the phone is unlocked and you have coverage
Check the sim card is it working ? maybe a modem issue.

[Q] help me out for using 3G on ATT Go phone

hi.
Recently i bought Galaxy Note white from Amazon. It is originally from HongKong.
and I didnt rooting. I bought a ATT Go Phone sim card and activated($50, everything unlimited),now it is working for calling and txting but web and internet is not work
even H+ is shown on top of my screen.
when I try to connect internet, it says " Media Net. To use data service, you must have a data package. go att.com/mygophone"
I already tried vary of APN setting but still not work.
Here is my question.
1) Do I have to buy another sim card? because mine isnt read 3G on sim card.
2) I have a dumphone. Should I put in my sim card to dumphone and call ATT my phone doesnt work for internet?
any other advise will be very welcome.. plz help me..
Apparently, ATT knew you have a smartphone...so your unlimited data plans are block.
I have the same problem...you can check if your dump phone can use for web.
If can't ..call the CSR with your dump phone...see they can fix it. Then try to insert the SIM again when it's fix.
If it's don't work...your have to purchase a data plan.... I got the 250 minutes for $25 and 500MB data plan for $25. And the 500MB data plan will roll over if you enrolled Auto payment every month.
Good luck

[Q] PB99110 on AT&T - No Data

I have purchase this guy back in March of 2010 and received the PB99110. I didn't have data service back then and never had up until a few weeks ago. Before I was on AT&T until April this year. I switched to T-Mobile because they were cheaper and was shown coverage was good enough in my area. I switched over to them and well, both my wifes Galaxy Note and my phone could hardly get a voice connection. I eventually switched over to StraightTalk with using an AT&T SIM that ST provided.
I for the life of me cannot get any form of data connection on this phone. I swapped SIMS between my works iPhone 3GS and data works on it. Putting my works SIM in my Nexus One still doesn't get 3G nor Edge. I've updated the APN settings for AT&T and tried the ones for Straight Talk. I have also tried using the APN that my SIM wants to use.
Currently using CyanogenMod-7.2.0-passion and I have tried to flash to factory as well. Still no data =/
I'm running out of ideas here. Help, please!

US Cellular phone, Cricket/ATT SIM Issues and Questions

Hi, I'm new here but have been using the site for a long time to root several phones of mine over the years. I have a question. I just bought the Galaxy s6 for US Cellular but I have a Cricket SIM and the phone is factory unlocked so when I got it, I had to set up APN to use and now shows as ATT. Cricket ,ATT same company now, I know. The question is, is there a way I can either put this phone on ATT or Cricket stock rom? I have issues with signal bars and I really want Wifi Calling as a bonus. Tried flashing ATT ROM with Odin and 5 files but no luck. PIT failes to re-partition. Any help? Thank you.

SIM card ATT issue

I'm with ATT. And I found out I have an issue with my SIM card. I'm not receiving text messages. I switched Sims with my wife and my xz1c receives messages. I went to the ATT store and they gave me a new sim but when I tried activation they said my phone is 3g based and they couldn't activate my sim on the spot. They had to put in an ATT work order and wait and see. Anyone have a similar issue? I think it's a ploy to get me to buy a new phone they were offering too.

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