This feedback is based on a number of qualitative feedback from friends and personal experience as well.
So far, it seems that Diablo 3 works fine with the following ISP’s
Smart (tethered) – I tether my MacBook with my iPhone 4s and get to play just fine. Some people prefer a fixed wireless broadband connection though.
Globe (tethered) – I get to play with Rico of Technogra.ph (he tethers using a Samsung Galaxy S II)
PLDT – Generally good. I hopped into a number of games of friends and we’re rolling seamlessly.
On another note, one ISP stands out to be the provider to avoid for Diablo III:
Sky Broadband – Woes to Sky Broadband. They really dropped the ball on this one. I used to swear by Sky publicly as the best wired connection money can buy in the country. Service has dropped to a really poor rating in the past 2 months.
Brendan outlined it all here in a comment:
Many many emails to Skybroadband support center regarding Blizzard downloader P2P issues and unplayable in game experience with Diablo 3 (may be DNS, but may be that they have restricted Port 1119, which Diablo 3 uses) – to no avail.
Sky simply does not respond to queries and when you call them they tell you to send an email through to support center. Its a vicious circle.
Playing it on my friends PLDT connection works perfectly.
After 2 years with Sky, seems like PLDT really is the way to go.
As my cousin said, ” Pre-term fee for Sky is PHP 2,000.00, Diablo 3 is priceless. If it doesn’t work at 3Mbps, I’m dropping them for (insert ISP here).” Sorry Sky Broadband. I swore by your services. I really did. But sad gamer can’t compromise.
You know what’s most interesting? My wireless tethering is faster than my ethernet connection. Why, Sky, why? Note that I write this not to smear Sky’s reputation but 2 months of your IT support not knowing what the problem is makes for really bad service. Fans have waited for Diablo III for about a decade and we absolutely need to be online to play this (there is no offline mode). So you definitely should understand why gamers feel really bad about this and need to switch. We waited 9 years for Diablo III. We absolutely can’t wait for you.
To the others: how’s your gaming experience? Add me up: LOLMOWER#1648