Where can I buy burner phones?

[Catbell]

I need one for a timed quest all of sudden and now I can't find any at any of the shops. halp!

[Trifoilum]

in the slums, one of the cards are Street Sellers. Every now and then they offer burner phones.

[Sador]

Also in Gamble streets if you have enough familiarity.

[Catbell]

Thank you both!