An easy trick I always use to tell a real authentic style Reebok jersey from '02 - '11, especially if you don't have detailed pics like above, is by looking at the shoulders & sleeves. Many other teams use a shiny "dazzle" material, PHG does not. The material is a flat white or flat black. Here are a couple pics I pulled from eBay for comparison.
(the fake example is choppy because it has been resized)

I AM UNABLE TO ADD PICS NOW FOR SOME REASON, I ADDED ONE EASILY TO MY ONLY OTHER POST. BUT THIS INFO COULD STILL BE USEFUL WITHOUT IMAGES.

Another easy tell is the placement of the jock tag located near the bottom hem. Counterfeit jerseys tend to have them placed too high. The authentic ones' tags are ALWAYS about 1 3/4" from the bottom and about the same distance in from the side as well. Some fake may however have the tag in the proper place.