Dual Sims: Data + Voice?

[waltz]

I'm about to get a used 2G and I'm trying to figure out which service to use with it. I've already got an ATT sim that I use for talking/texting, but I'd like to add a cheaper data plan.

Can you use two sims simultaneously: one for data, one for voice? I'd like to keep my current ATT sim and add a second T-Mobile prepaid data sim.

[tonester1]

uhhh if u get an iphone clone (knockoff POS)

if u get a real Iphone then ur stuck with 1 sim

[waltz]

I did some googling and it looks like people are using these dual sim adapters to cram two sims into the slot. And there's some jailbroken app you can get to use both cards?

[IvanPK]

Eh - just thinking about slamming 2 sims in the iPhone almost brakes the one in my pocket... I'd say its not worth it and just add a 19.99 data add on..