A: This is rarely an APN issue. This usually means your background data is restricted or your phone's date/time is incorrect. Correct the time zone to "Bogota, Quito, Lima" and restart.
Colombia uses a unified MCC of 732. However, the MNC (Mobile Network Code) varies slightly based on the SIM card's age and region. claro colombia apn settings
default,supl,mms (or just "default,supl,mms" without spaces) A: This is rarely an APN issue