Este método é responsável por retornar informações sobre o device/celular conectado.

/device

Atributos:

{
"phone":"",
"imgUrl":null,
"device":{
"wa_version":"2.21.10.16",
"mcc":"724",
"mnc":"039",
"os_version":"7.1.2",
"device_manufacturer":"samsung",
"device_model":"SM-N975F",
"osbuildnumber":"samsung-user 7.1.2 20171130.276299 release-keys",
"platform":"smba"
  }
}

Alguns exemplos para auxiliar a implementação

Exemplo em C#

var client = new RestClient("https://api.plugzapi.com.br/instances/SUA_INSTANCIA/token/SEU_TOKEN/device");
var request = new RestRequest(Method.GET);
IRestResponse response = client.Execute(request);

Exemplo em PHP

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.plugzapi.com.br/instances/SUA_INSTANCIA/token/SEU_TOKEN/device",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo"cURL Error #:" . $err;
} else {
  echo $response;
}

Exemplo em Node.js 

var http = require("https");

var options = {
  "method": "GET",
  "hostname": "api.plugzapi.com.br",
  "port": null,
  "path": "/instances/SUA_INSTANCIA/token/SEU_TOKEN/device",
  "headers": {}
};

var req = http.request(options, function (res) {
  var chunks = [];

  res.on("data", function (chunk) {
    chunks.push(chunk);
  });

  res.on("end", function () {
    var body = Buffer.concat(chunks);
    console.log(body.toString());
  });
});

req.end();