While some improvements can be made to increase the speed, it is important to know that RUT240 utilizes Cat 4 modem, which has a maximum theoretical download speed of 150Mbps. It can utilize only one carrier at a time. Meanwhile most mobile phones use modems with category 20 or higher, and are capable of aggregating 5 carriers or more, so RUT240 should not be compared to a mobile phone. We have a YouTube video available about this topic:
As for maximizing the throughput, here are a few suggestions:
Enable Software flow offloading. Navigate to Network → Firewall → General Settings and enable Software flow offloading;
Run tests to different servers, ideally, iPerf3 can be used to measure the real speeds, as Ookla servers can be overloaded;