.109 works, but .90 seems to be the standard for EDGE holding with an APN. i've been fighting this for about 2 wks now and i've settled on OOAK's 7.99c hybrid.
It's very fast, holds EDGE well, and has all the included stuff. There's a shrunk version if you dont want all the extra crap.
BBHybrids.net - Blackberry Hybrids: Forums / OneOfaKindDPC's Hybrids / THE REVISION BY OOAKDPC. VERSION 7.99 A, B, C, AND D fOR 9530