Contacts? If you mean those golden lines thing then yes.
As for games, I tried playing a whole lot of games from different sources but all of them freezes.
The games I tried are :
0022 SuperMario 64 DS
0042 Nintendogs Chihuahua & friends
0088 Advance Wars Dual Strike
0098 SD Gundam G-Generations DS (Doesn't freeze all that often)
0113 Ultimate Spiderman
0182 YU-Gi-Oh Nightmare Troubadour (Doesn't freeze all that often)
0415 Megaman Battle Network 5
0662 Digimon World DS
0911 Spectobes
1330 Rune FActory
1422 Digimon World Dawn
1456 Legend of Zelda- The Phantom Hourglass
1515 Luminous Ark
1549 Megaman ZX Advent
1560 Code Geass (Doesn't freeze all that often)
1695 Mario Party DS
1964 Advance War Days of Ruin
2107 Final Fantasy Cystal Chronicles
2187 Kidou Senshi Gundam 00 (Doesn't freeze all that often)
2252 The World Ends With You (CAn't get pass the opening movie, It get's jammed at exactly the same spot everytime, which is when you run pass a bandanna guy. I've tried downloading from different places alot of times with the same result )
2337 Summon Night Twin Age
2389 Megaman Star Force 2 Zerker X Saurian
If it is the game problem, can you suggest some games and where to download it so I can check please.