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G2X won't recognize SIM card

Anyone else experience issues with swapping their SIM from their old phone into the G2X? I have reseated mine from my N1 into the phone 3 times, and each time I boot it says I have no SIM card. Pulling my hair out!

I went from an N1 to the g2x and i had the same problem so here is the deal...
the g2x is a 4g phone and it required a new sim card version so i had to trade in the sim card that i have had since my i got my razr in 2005...
so disclaimer to anyone who buys the phone outright, you have to have an updated sim card... just go into tmobile and they will give you one...

mines wont check for sim card at all it keep saying no service even without a sim card it usually say no sim but it just say no service can someone help plz plz plz

Fyi make sure it is a corporate store. Otherwise it could cost ya $20. Customer care might even be able to mail you one...not sure. If your near Chicago I would just give you one of my extras.
Sent from my LG-P999 using XDA App

I reused the sim from my N1 and have had no issues but it was probably a newer version sim since I just got it beginning of last year.

If you have an old T-Mobile phone lying around, try inserting your SIM into that, and using it, then re-insert it into your G2X.

Alright I opened it up and it looked like the antenna cable was a bit frayed near the tip, I attached a few pics. It was connected though so not sure :/
http://imgur.com/i2oH9,5LnGx,n97wZ ( three images)

I have the same issue.
Mint condition G2X does not detect my sim card reads "error while trying to connect to network"
I am running CM 7.2 I have wiped everything and reflashed still no luck.

Add one more to the pile...
I also recently began having this problem, but my device previously worked fine.
I have tried Restoring to Factory V21Y with Mar 11 Baseband
Flasing a GB Based ROM & Stock Kernel
Flashing CM9
Flashing CM10
Entering *#*#INFO#*#* Phone Info and modifying frequency band (No Go).
At one point I was able to read the Phone # from the SIM card, but couldn't get a lock on Netowkr. I can visually detect T-Mobile and ATT in Mobile Networks.
I have tried this with 4G Enabled SIM Cards and older T-Mobile SIM Cards.
I have tried Simple Mobile, Straight Talk, & ATT SIM Cards.
I have tried using None APN's, the TMo/Simple Default APN's, and Modified APN's for Straight Talk & Family Talk.
No avail.
Any ideas?

I had the same problem. A new SIM card fixed it.

RE:
Core Memory said:
I had the same problem. A new SIM card fixed it.
Click to expand...
Click to collapse
I gave my friend my old G2x because she was switching from AT&T to TMobile. She went to the TMobile store and got a new SIM card and her old AT&T number transferred to it. It works on her old iPhone but when I insert the SIM card on the LG G2x , it keeps saying 'no SIM card inserted'....do i need to flash a certain baseband on it and/or setup a custom APN for it? I am on the stock ROM thats rooted...
Any help is much appreciateed

Sorry for not replying until now but I rarely visit here anymore. My G2X had a bad Sim card which a new Sim fixed. I just had to wait until the network could authorize with it.

[Q] Foreign SIM card not being read by rooted phone

Hey all,
I'm trying to use a foreign SIM card (a prepaid card from Taiwan Mobile), but my phone says "No SIM card in phone" on the lock screen. I'm sure my phone is rooted and I flashed Android Revolution HD 5.2.6, but the lock screen is still giving me the same message. Is this a problem with the SIM card, or my phone? I also had the same problem when I got the phone, when I upgraded with a dumbphone from AT&T to the Inspire 4G, and AT&T had to give me a new SIM card. Also, the contact size for the SIM card is smaller on my AT&T 4G SIM, so I don't know if that might be of any help. Thanks!

My first assumption would be that whatever language the card is written in, the phone isn't able to translate. But I don't even know if that's a real thing or not either. So this post was pretty much pointless in helping you understand your problem.
I'm sure someone smarter will be by soon with some insight.
*insert sig here*

Not all GSM phone services are 100% intercompatible. I don't have any idea how you would find out, but a good start might be to call a rep at Taiwan Mobile.

[Q] INVALID SIM CARD HELP???? Please Read

Well I recently purchased a G2x and I wanted to use the phone on the Simple Mobile Network, but when I put the sim card in and power on the phone it states "Invalid Sim Card" now when I contacted LG about this their tech support stated that I need a new sim card, but that makes no sense because the sim card works on other phones so as you can see I'm at a loss as what to do or what could be wrong. I've included what it shows as far as the system information that I see. Also I should mention that the phone starts up fine, but it never requests an unlock code??
Android Version-2.3.3
Baseband Version- M660A-SCAUTNZ-2.09720T 1 [JUL 15 2011 10:00:00] MP:TRULGE_08.09.02R_MDM
Kernel Version- 2.6.32.9
Build Number-GRI40
Software Version-LG-P999-V21e
Any help in any way would be greatly appreciated... Thanks in advance

First of all this is P990 forum the P999 can be found here http://forum.xda-developers.com/forumdisplay.php?f=1114
Are you sure that it works with other carriers than T-mobile? If you are sure, replace your SIM card.

I have no problem with simple mobile, try a new sim
Sent from my LG-P999 using xda premium

Did you unlock the device? It may need to be unlocked for your Simple Mobile SIM...

The phone has been unlocked and the crazy part is that I put a brand new sim card in it and it still would come up as no sim card. So I'm at at a loss now because the only sim that seemed to respond was tmobile, but the ones I used from simple mobile would not be read.

Go to the Dev section and look at CWM. Make your phone bullet proof first.
Then in CWM wipe everything but the SD card. If you need help let us know. Download a rom (I use weapon) using your computer. Place it on your SD card. Load CWM. Select install zip. Select the rom on your SD card. Let it install then wait 10 minutes reboot wait five minutes then log on and enjoy.
Also look at the wind united post. It may help.

Make sure you are inserting the sim fully and it is making contact. Also sometimes it does that and reboot fixes it.

Thank you all for the info and help. I really would like to avoid having to root the phone.. I did find out though from LG that apparently these phones are having problems with the IMEI number... A representative stated to me that if the phone says "Invalid Sim" then you must contact T-Mobile so they can unlock the IMEI number, but in my case it is saying that there is "No Sim Card" I've used At&t, T-Mobile and Simple Mobile sims and it still says "No Sim Card" which leads me to believe that it is a hardware issue and I'm actually sending it in for repair....
So for any of you who get the "Invalid Sim" dont bother calling LG cause they will basically give you the shaft and send you back to T-Mobile to get the problem resolved...

Hmm......sometimes I put my sim card the wrong way which gave me invalid sim card msg..... so just double check that the cut off edge is on the right side.
Also, if your phone is indeed unlocked, try unlocking it again it would not hurt.
I would also check the radio frequencies capabilities for your phone because simple network might not support that. For example, I use wind network in canada, which uses the radio frequency equivalent of 1700, which is also compatible to t-mobile g2x.
Hope this helps.

You said it has worked with a T-mobile sim card? Are you sure? Borrow someone's sim card for a few minutes (one that has an account on it) and see if it works.
If it does than it sounds like the phone is actually locked.
If it doesn't than the phone is the problem. It's either on the wrong baseband (not 1700) or it's a hardware problem.
Honestly, even a locked T-mobile phone should work with Simple Mobile. I have set up 2 locked phones with them already (one G2x today, and one older phone) with sim cards from ebay.
So the final question is, did you buy a Simple Mobile "activation kit" or just a replacement sim card? You need a NEW, unopened sim card kit. Ebay could have sold you a previously owned one.
Hope this helps.
---------- Post added at 11:48 AM ---------- Previous post was at 11:40 AM ----------
One more thing. If an active T-mobile card works in it you could try forcing the APN settings to Simple Mobile.
Root your phone (it's easy I promise!) There is also an unroot application you can install if you're worried. Look in the market.
Then install an app in the market called APN Manager. Delete the T-mobile APN listing. (write the t-mobile settings down so you'll be able to add it again if necessary.)
If all of this is too much for you, seriously just exchange the phone and start over. But MAKER SURE the new phone is for a USA 1700 cell phone service!

HerrKuk said:
First of all this is P990 forum the P999 can be found here http://forum.xda-developers.com/forumdisplay.php?f=1114
Are you sure that it works with other carriers than T-mobile? If you are sure, replace your SIM card.
Click to expand...
Click to collapse
Umm......the G2x is P999.....this is the right forum section. And that forum link is to this forum section....
Also, I should add that you should be on stock ROM if your using this phone on a different carrier. The unlock menue doesn't show up on CM7....unless they've changed something int he past couple months.

Well I've sent in the phone for repair so hopefully I get this resolved at some point, but thanks everyone for the info I'll keep you updated.

[Q] Phone will not read my SIM card (Straight Talk)

I apologize ahead of time if this has been asked or even answered but I HAVE been researching and finding NO help in my problem.
I purchased a Straight Talk phone the other day for the SIM chip as my last resort for immediate phone service. I had been told by many people that it would be able to be slapped into my phone and I would have no problems after changing the APN settings. I set up the plan and made my account with Straight Talk and then took the Card out and put it into my device.
My device is rooted with Cyanogen Mod and has S-OFF.
I then tried to start the phone up and got a message saying "No SIM card"
I did not get prompted to enter an unlock code or anything, just the No SIM card error which also means I can't save APNs...
The SIM Card works in the phone I bought it from, which is the Motorola W418G.
Now I have no clue if I am missing something, did I mess up? Or is it that for some god awful reason that SIM chip won't work in my phone at all?
Please any information, links, replies, ANYTHING is HIGHLY appreciated and again I am sorry if this specific question has been asked and answered, I could find nothing on this specific problem and I am hoping I didn't just waste a ton of money on going back to a pretty basic flip phone...
-JV

Pretty sure you need sim from another phone, a couple years ago it was the nokia e71. But nowadays you can just order a sim from the website
Sent from my LG-E970 using xda premium

Please post all questions in the Q&A section. Thanks! Thread moved.

I have the exact same issue as you JV. But I'm experiencing it with a Galaxy Nexus that can't recognize the SIM card that was bought with a Samsung SGH-T528G. The SIM card work fine in the T528G but not in Galaxy Nexus and also not in my wife's previous flip-phone. I have a T-Mobile SIM card that works fine in the Galaxy Nexus and in the flip-phone. And yes, the Nexus is running stock, non-rooted and unlocked (from the Play store).
I'm curious - did you figure out the issue? Any solution for your phone might work for mine... Thanks in advance!
- Philip

Look here:
http://www.walmart.com/browse/no-co...072335_1097404/YnJhbmQ6U3RyYWlnaHQgVGFsawieie
You have to cut the sim for micro sim devices to use T-Mo with ST. At least for now. HTH.
Sent using the power of the dark side

[Q] Skyrockt on Straigh Talk sim issue

New guy here.
I recently purchased an AT&T i727 with the plan to use the bring your own phone program with straight talk. Even with the sim card activated, the phone reads "No Sim Card. Emergency Calls Only". I've used the sim card in other phones, so I know it's functional. I've rooted the phone and installed different roms, but I still get the same error. I can't edit any of the APN or network settings because it tells me I need to have a sim card inserted to do so.
I feel like I'm not super clueless at things like this, but I've done everything I know how to do. Any help is greatly appreciated.
Take it easy on me guys.
Thanks in advance

Sound like the phone isn't unlocked. There is a thread here on how to unlock it for free. Look in the general section.
Sent from my SAMSUNG-SGH-I727 using xda app-developers app

Assuming the ST SIM is at&t SIM card , and it was working before , the problem might be somewhere around your phone , either SIM card slot , bad radio or blocked-from-network Skyrocket ... is it a craigslist phone ?

It is an AT&T compatible ST sim. I've already entered codes to unlock it and they all said the unlock was successful.
I actually purchased the phone on eBay. (I'm sure everyone will laugh upon reading that)

If the sim card works in other phones and doesn't work in your skyrocket but you have it in the correct way in the sim slot then it's gonna be your sim card slot. With ST your phone doesn't have to be unlocked for the sim card to work in it. Trust me on that I'm using my skyrocket on ST and have used about 10 different AT&T phones on ST and none of them were unlocked until I sold them. You'll need to get ahold of eBay and paypal (who you hopefully used) and try and get your money back. Otherwise you have a really expensive mp3 player.
Sorry for the bad luck but that's what it looks most like to me. I used to work for AT&T and that's the logical problem. I would say try and get a warranty for it but I doubt it still has a warranty and even if it did AT&T and Samsung wouldn't do anything about it because a problem with the sim card slot is considered physical damage. You'll just have to try and get your money back for the phone.
Just my advice and $.02