2. type your unfreeze code and hit unlock button. you will get unsuccessful message but don't worry that's fine. 3. type unlock code and hit unlock button. 4. if you get unsuccessful again then. Unlocking samsung “unlock network request unsuccessful” cable unlock , imei unlock , samsung when you insert a sim card from a different cellphone operator than the original, your samsung phone asks for an unlock code and prompts you to enter the “ network blocking control key ” or “ sim network unlock pin “.. Network unlock request unsuccessful hi, i'm have a samsung galaxy 3 model sgh-i747, i received the approval mail from at&t and follow the instructions to unlock," replace the at&t sim card by the new operator sim card", since i'm actually travelling to portugal i insert a portuguese sim card from (meo - pt), but it's not working..
In order to unlock samsung galaxy s3 network blockade, you need a nck (network) code. if the code counter is blocked, you will need mck (unfreeze) code as well to reset the code counter. if samsung galaxy s3 has a blockade for a subnetwork like tesco or virgin you need to use a spck (service provider) code.. Now, regarding the "network unlock unsuccessful" or "code error" issue there are a three troubleshooting guides: solution #0 (added on 10 december 2014) insert a non accepted simcard and enter code when prompted for a code: for samsung galaxy s2, galaxy s3, note, note 2. 1. go to the dial pad and dial *#197328640#. Unlock unsuccessful. i have tried the code att gave me several times.i have resubmitted the imei number several times and recived the same code. i have contacted att support several times. i have the same problem with my samsung galaxy s3. i gave my imei over the phone as well as email. unlock code for galaxy s3 does not work..
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