Is a Samsung Galaxy s3 a cdma or gsm phone?

The Samsung Galaxy S3 comes in both CDMA and GSM variants, depending on the specific model and carrier. The GSM version is typically used by carriers like AT&T and T-Mobile, while the CDMA version is used by carriers like Verizon and Sprint. Therefore, whether the Galaxy S3 is CDMA or GSM depends on the specific model and the network it is designed for.