Question [Q] Is there any problem to use a kdz from a country different?

Hi everyone.

I have an LG P880 (LG 4X HD) that I bought in Peru, it came with Android 4.0.3 I (V10b). I want to upgrade to JB to unlock the bootloader but in the list of official updates my country is not listed.

Someone told me that it can be an issue with the frequencies, Peru uses 850Mhz/1900Mhz bands like American countries but many other countries (including those of the official update list) use 900Mhz/1800Mhz.

My question is: There would be any problem if I upgrade using the file from another country?

My phone is rooted

Thanks to all comments.

PS: Sorry for my English.