On LG motion 4g, i can enther metro pcs hidden menu, to switch the network mode to evdo auto but i can't find this option on galaxy s3. I have galaxy s3 from metro pcs. Did official update to 4.1.2. I can't find a way to change network mode to 3g only. Although, I found an option on service mode. which has LTE only, CDMA only. HDR only. But when i choose hdr only for 3g, I can't make a phone or receive call. it only allowed to surf online. Please help how to change to HDR auto instead of hdr(data) only.