How can I transfer my all contacts from old HTC Wildfifre android 2.1 to LG Optimus Vu

I just want to transfer all contacts from old HTC Wildfire with android version 2.1 to new LG Optimus Vu with android version 4.0. I have used different apps but still I am unable to transfer contacts and an unexpected error occures. Another issue is that I can't move contacts to SD card because LG Optimus Vu does not supports SD card. Please recommend a simple and easy way or an app which is helpful to transfer contacts to the new LG optimus Vu from HTC Wildfire.