Confusion about modems + custom recoveries
I have an i337m from Puerta Rico that I'm running on USA T-mobile. The radios are the initial release and I'd like to update them. I'm running Wicked V10. I've successfully (I think) done the AWS hack to get the GSM HSPA+ bands.
a) Do/Can I flash T-mobile S4 radios?
b) A little confused about flashing radios on a custom recovery. I tried flashing the MK2 radios but it obviously checked the boot loader when it failed.
Thanks for any help.