What is the problem with your Nokia 6230 ? if you are seeking for network unlock, You can get the restriction code for your Nokia 6230 from any online site. But be wise in choosing a reliable source. For example i would suggest you to choose www.Simpleunlocking.com I have unlocked couple of my mobiles from here. This site provided me accurate unlock code at affordable cost. You too can have a try at here. they will provide complete guidance on unlocking
SOURCE: Nokia 6230 insert sim error
Insert sim error could be a problem with the sim card contacts, check if the sim card is locked properly and connections are all clean.
SOURCE: nokia 6230
Tell Vodafone that you want to change to O2. If your phone as it is will take O2 you will have no trouble. otherwise you will have to find a phone shop that will open the phone to all networks.
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