Is there a way of adding a roaming network to a phone? I just got back from Cuba and my Samsung S3 would not log onto Cubacel network. I have the LD data/saver plan and tried the phone on WCDMA and GSM. My friend had a Galaxy Ace before and now a S4 and had no problems. Even got a greeting text from Koodo on arriving in Cuba. As I recall he somehow added Cubacel as a network operator before going down. Any idea if/how to do this?