i phone 4 not joining wifi

  eurosteve 15:45 30 Jun 13
Locked

Hi , i have an iphone 4 which was locked when i found it (in my taxi) nobody claimed it so i got a mobile unlocker to make it work - dont actually know what he did but it cost £70 and he said the phone will work in a non uk country which is ok as i have since moved to france and put in a sim. Phone calls and text work fine. But i cant get it to join my wifi which is really odd as i get people here on holiday who can join with all manner of devices including iphones no problem. Looking online there seems to be all manner of factory resets / hard resets etc etc is this likely to work and if i try will i need a security code ? i dont have or use currently and wouldnt know what it was anyway.

any advice appreciated.

Thanks

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