Slvr L7 Strange Problem
 

i have a SLVR L7 with a strange problem.. it reads some SIM cards in my country..

here in colombia there's 3 types of SIM card

OLA.. in red color
OLA.. in yellow color (recently)
MOVISTAR

it reads all SIM cards except OLA red, but the movistar SIM card reads perfect

when I insert OLA red phone says INSERT SIM:eek:


what can be????
THANK YOU FOR HELPING ME...