The Samsung Galaxy J5 Pro (SM-J530S), primarily a South Korean variant, can be modified to support Dual SIM functionality and fixed network issues using an Auto Patch firmware. For devices on Binary U7, this process involves flashing specific files that bypass the need for manual IMEI patching after repair. Understanding J530S U7 Auto Patch

If the second SIM still doesn’t appear, try a factory reset (Settings → System → Reset → Factory data reset). This forces the new radio config to be read.

auto-patching, you can follow this structured guide. This process is typically used by technicians to restore network functionality after repairs like IMEI restoration. Technical Guide: Samsung J530S U7 Dual SIM Auto-Patching 1. Introduction and Prerequisites

However, it is not for casual users. You must be comfortable with unlocking bootloaders, flashing custom recoveries, and understanding the risks of tripping Knox. For those who are, the reward is a fully functional dual-SIM Galaxy J5 Pro that Samsung and SK Telecom never intended you to have.