Service steering defines different carriers for specific services to optimize radio conditions, but can cause congestion and lower success rates at high traffic. Random combing allows free competition between carriers. While it requires continuous coverage on both, it maximizes resource usage and improves throughput, success rates, and delays when traffic is high. The document provides a technical analysis of these techniques and recommends random combing over service steering when there is high data traffic and sufficient second carrier coverage based on associated improvements in key performance indicators.