Is OnePlus 9RT worth buying? How is the signal?

I bought a OnePlus 9RT for my brother. I like its relatively high performance configuration. The performance of the Snapdragon 888 LPDDR5 UFS3.1 combination is really good, whether it is playing large-scale mobile games or running multiple The APP has no lag at all, and the signal is also very good. When using the mobile phone when going out, the data flow never drops, it is stable!