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no sim recognisation

If you are sure it is installed correctly and is not being recognized ... I would take it to where I bought it and get a replacement SIM.

... Thom
 
When you say it isn't recognized, do you mean it says "no sim card" on your screen or you can't connect to data or make phone calls?

It could be a bad sim or it wasn't provisioned correctly. I'd take @Thom 's advice and take it back to where you got it.
 
Hmmm, okay, that was going to be my next question, but you've answered it. I'd check the sim slot for any debris. If a small bit of paper got in there it could easily keep the sim from being read properly. The only other thought is that the contacts got damaged and that would be something you'd have to send the phone into a service shop to fix.
 
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