title: How to get network speed in the ADB shell without using iwconfig
body: <p>i'm trying to get the bit rate using the iwconfig for the wireless wlan0 but it is no getting it
  and also tried to get with file sys/class/net/wlan0/speed it is also no getting the answer</p>
  
  <pre><code>cat sys/class/net/wlan0/speed                                 
  /system/bin/sh: cat: sys/class/net/wlan0/speed: Invalid argument
  
  :/ # iwconfig                                                     sit0 no wireless extensions.
  
  lo        no wireless extensions.
  
  wlan0     no wireless extensions.
  
  tap0      no wireless extensions.
  </code></pre>
  
  <p>it is connected to wlan0 but not showing</p>
  
  <p>iwant the command that can get the bit rate for the wlan0 and also for the sim interface can anyone help me with this</p>