⭐⭐⭐☆☆ (3/5) – stable enough for daily use if you know the risks.
Here’s a review of based on typical characteristics of regional GSM (Grafik Seluler Multimedia) custom ROM/firmware for Android devices (commonly for Samsung or local Indonesian vendor phones): GSM Sulteng v1.3.6 – Review Overview GSM Sulteng is a custom firmware developed by a team from Central Sulawesi, Indonesia, aimed at optimizing older or low-end Android devices. Version 1.3.6 appears to be a maintenance release focusing on stability and performance. gsm sulteng v1.3.6