S5830, S5830L and S5830B they are all the same except for the baseband.
They use different frequencys.
You shoudn't have any problem.
Unless you installing a Stock ROM you'll have problems with 3G connection which can easily be fixed.
I have already installed the fw in 5830L 5830B and never had problems, I think the problem would be in relation to 5830C, in which case they would have a fw specifies him.
I installed the rom version 2.3.4 (vivo - Brazil) in my galaxy s5830L (3g 850/1900MHz). My mobile carrier works with 3G 2100MHz, so I can not connect to 3G only 2G (edge).
Do you know if there is any possibility to enabl...