回線ましになったかな?
しかしパケロス酷い
予備機と差し替えてみる?

$ speedtest
   Speedtest by Ookla
[error] Error: [-3] Try again
[error] Error: [-3] Try again
[error] Error: [-3] Try again
[error] Error: [-3] Try again
[error] Error: [-3] Try again
      Server: Rakuten Mobile, Inc - Tokyo (id: 24333)
         ISP: Rakuten Mobile Network
Idle Latency:   476.90 ms   (jitter: 180.40ms, low: 243.96ms, high: 632.92ms)
    Download:     8.48 Mbps (data used: 14.7 MB)
                898.88 ms   (jitter: 89.82ms, low: 198.27ms, high: 3139.39ms)
      Upload:     1.16 Mbps (data used: 1.9 MB)
               1371.86 ms   (jitter: 95.15ms, low: 211.57ms, high: 3430.71ms)
 Packet Loss:     9.4%
  Result URL: https://www.speedtest.net/result/c/2f0f78cd-63ea-4f65-b88b-826d0957ca7a