if u wanted to know how to fix wifi communication and connection this is the common problems.\
1.If u have a case on the ds that is thick on ds then if you remove it u get 2x the range
2.if u have dropped your ds then it could of broke a wire off the wifi (u should be able to unscrew the ds...
Well i was at a r4 review and they said that doom ds does not work on r4
u need dldi auto patching is all but other than that there is no freezez on the r4
someone also told me u cannot put up to 2 gig micro sd card in r4 is it true