IPHONE 5 UNLOCK

I got this Iphone 5 from my bro.The problem am having with it is that it is not compatible with my network in my countryand hence, I haven't been able to use it with our local network because it was locked to only use Orange Switzerland network.

Below are the details of the phone.

Model:A1429

FCC ID:BCG-E2599A

IC:579C-E2610A

IMEI:013349002242705.

I will be very grateful if I can be assisted on this particular issue.

Thanks in anticipation of your kind response