[Q] Any way tochange my Lumia 920 IMEI number? topic

Hi every one...
First.... my phone is not blacklisted...
I live in Venezuela, here we have 3 mobile carriers, my phone only recognize one carrier (just the one that I don't use) the other two recognize the sim card but no signal error, in just one opportunity one carrier says that this phone can not be used... I purchase this phone in Colombia unlocked it there and them brings it to Venezuela... So it's not blacklisted... I want to try changing the IMEI number and try... the carriers here don't has the phone in blacklisted neither...

Any advise...
Thanks you so much