I own a cellphone repair shop and had run across the same issue. None of the places I ordered my Galaxy screens from showed a replacement specifically for the Straight Talk SCH-S968C Galaxy S3. Luckily I had an AT&T i727 S3 in for a screen replacement at the same time as the Straight Talk phone so, I stripped them both down and compared the mid frames. I then tried the AT&T replacement screen on the Straight Talk phone. The result was that the replacement screen for the AT&T Galaxy S3 (i727) fit and worked perfectly on the Straight talk phone. :)