Monopole Antenna Design Using CST

I am doing a project on assessing the SAR values of monopole antennas of mobile phone. I couldn't find any sat file of mobile phone with monopole antenna. Anyone know that is there any? Or the only way is to design it on my own? In between, can i have some guidance on designing a mobile phone monopole antenna operate at f=0.9GHz using CST?

p/s: I am running out of time. Help is needed.