I bought a Cingular prepaid sim yesterday to prevent my $4 roaming charges on my dutch sim, after a load of calls I was ready to reload the credit:

Their "automated customer service line" was down

Their alternative credit card system didn't recognize my number

Their "live customer service" line's rep couldn't recharge the number because it would take 48 hours for it to appear in their system

Their myprepaidrefill site didn't allow numbers from my area code to get refilled

So... I now need to go to a cingular store and get a topup card, I think not... They can take the whole card back, what a useless service, I hope Voicetreams prepaid sim is a bit better...