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Trying to Unlock: Connection Problem or invalid mmi code

OP ighost77

30th August 2012, 04:14 AM   |  #1  
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I enter the code # 7 4 6 5 6 2 5 * 6 3 8 * #, that supposed to bring me to unlock code screen and get "Connection Problem or invalid mmi code" message.
Any soultions? Using stock 4.0.4 ATT, rooted, if it matters. UCLG1

Don't have non ATT card to try unlock without this code string.
30th August 2012, 04:19 AM   |  #2  
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Quote:
Originally Posted by ighost77

I enter the code # 7 4 6 5 6 2 5 * 6 3 8 * #, that supposed to bring me to unlock code screen and get "Connection Problem or invalid mmi code" message.
Any soultions? Using stock 4.0.4 ATT, rooted, if it matters. UCLG1

Don't have non ATT card to try unlock without this code string.


just go to a Tmobile store and ask to borrow a sim...thats what I did and the rep took her sim out and tossed it to me. Very cool.
30th August 2012, 03:04 PM   |  #3  
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The North America versions don't use a dialer code for the unlock prompt. The only way is to put in a 'foriegn' sim. I also went to a tmobile store to borrow a sim for my unlock

Sent from my Galaxy S3 running DietICS
30th August 2012, 04:23 PM   |  #4  
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Just asked from my colleague to use his Verizon micro SIM.
Turned the phone on, entered unlock code and it's done!

Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
30th August 2012, 05:49 PM   |  #5  
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this:

http://cgi.ebay.com/ws/eBayISAPI.dll...m=200810428808
30th August 2012, 06:35 PM   |  #6  
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I wanted to unlock my AT&T Vivid so I could sell it, I went to the T-mobile store, told them what I needed and they gave me a sim card, I tried to pay for it but their computer system would not let them charge me.I got a brand new unactivated sim card.

Does the Galaxy S3 use a micro sim or a mini or what ever it is called??? I sure hope I do not have to get a new sim that will not work in my Nexus when I get my Galaxy S3!!!
Last edited by moe3754; 30th August 2012 at 06:39 PM.
30th August 2012, 08:38 PM   |  #7  
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Quote:
Originally Posted by moe3754

Does the Galaxy S3 use a micro sim or a mini or what ever it is called???

Micro SIM
The Following User Says Thank You to ighost77 For This Useful Post: [ View ]
1st October 2012, 06:37 AM   |  #8  
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Quote:
Originally Posted by ighost77

I enter the code # 7 4 6 5 6 2 5 * 6 3 8 * #, that supposed to bring me to unlock code screen and get "Connection Problem or invalid mmi code" message.
Any soultions? Using stock 4.0.4 ATT, rooted, if it matters. UCLG1

Don't have non ATT card to try unlock without this code string.

Thank you so much for this. I used this on my Galaxy Note and it worked. AT&T sent me the wrong prompts, I was going crazy.
3rd October 2012, 12:37 AM   |  #9  
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Quote:
Originally Posted by ighost77

I enter the code # 7 4 6 5 6 2 5 * 6 3 8 * #, that supposed to bring me to unlock code screen and get "Connection Problem or invalid mmi code" message.
Any soultions? Using stock 4.0.4 ATT, rooted, if it matters. UCLG1

Don't have non ATT card to try unlock without this code string.

this code method dosent work at all for att i tried it too...then i caontacted att they told me that this method should work...then i tried a diffrent method i have AIRTEL indian sim i cut it to the size of micro sim and inserted it into my s3 and when turned it on it asked me for an unlock code..i entered the code and BOOM.... UNLOCKED.....you can use the same methed try some other service sim....it dosent matter if that sim doesent work at all....(i got my unlock code from att for free)...

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