diff --git a/lib/commands/certificate.js b/lib/commands/certificate.js
index 0e51ee505..a780cfe7b 100644
--- a/lib/commands/certificate.js
+++ b/lib/commands/certificate.js
@@ -8,6 +8,7 @@ import path from 'path';
 import http from 'http';
 import { exec } from 'teen_process';
 import { findAPortNotInUse, checkPortStatus } from 'portscanner';
+import Pyidevice from '../py-ios-device-client';
 
 let extensions = {}, commands = {};
 
@@ -309,6 +310,15 @@ commands.mobileInstallCertificate = async function mobileInstallCertificate (opt
       log.info(`The certificate cannot be installed via CLI. ` +
         `Falling back to UI-based deployment`);
     }
+  } else {
+    const client = new Pyidevice(this.opts.udid);
+    if (await client.assertExists(false)) {
+      await client.installProfile({payload: Buffer.from(content, 'base64')});
+      return;
+    } else {
+      log.info('pyidevice is not installed on your system. ' +
+        'Falling back to the (slow) UI-based installation');
+    }
   }
 
   const tmpRoot = await tempDir.openDir();
diff --git a/lib/driver.js b/lib/driver.js
index d7a763bc5..9db23aca7 100644
--- a/lib/driver.js
+++ b/lib/driver.js
@@ -35,6 +35,7 @@ import AsyncLock from 'async-lock';
 import path from 'path';
 import IDB from 'appium-idb';
 import DEVICE_CONNECTIONS_FACTORY from './device-connections-factory';
+import Pyidevice from './py-ios-device-client';
 
 
 const SHUTDOWN_OTHER_FEAT_NAME = 'shutdown_other_sims';
@@ -468,6 +469,8 @@ class XCUITestDriver extends BaseDriver {
         // Retry log capture if Simulator was not running before
         await startLogCapture();
       }
+    } else if (this.opts.customSSLCert) {
+      await new Pyidevice(udid).installProfile({payload: this.opts.customSSLCert});
     }
 
     if (this.opts.app) {
diff --git a/lib/py-ios-device-client.js b/lib/py-ios-device-client.js
new file mode 100644
index 000000000..1902b473c
--- /dev/null
+++ b/lib/py-ios-device-client.js
@@ -0,0 +1,96 @@
+import { exec } from 'teen_process';
+import { fs, util, tempDir } from 'appium-support';
+import log from './logger';
+import path from 'path';
+
+// https://github.com/YueChen-C/py-ios-device
+
+const BINARY_NAME = 'pyidevice';
+
+class Pyidevice {
+  constructor (udid) {
+    this.udid = udid;
+    this.binaryPath = null;
+  }
+
+  async assertExists (isStrict = true) {
+    if (this.binaryPath) {
+      return true;
+    }
+
+    try {
+      this.binaryPath = await fs.which(BINARY_NAME);
+      return true;
+    } catch (e) {
+      if (isStrict) {
+        throw new Error(`${BINARY_NAME} binary cannot be found in PATH. ` +
+          `Please make sure it is installed. Visit https://github.com/YueChen-C/py-ios-device for ` +
+          `more details.`);
+      }
+      return false;
+    }
+  }
+
+  async execute (args, opts = {}) {
+    await this.assertExists();
+    const {
+      format = 'json',
+      logStdout = false,
+    } = opts;
+
+    const finalArgs = [...args, '--udid', this.udid];
+    if (format) {
+      finalArgs.push('--format', format);
+    }
+    const cmdStr = util.quote([this.binaryPath, ...finalArgs]);
+    log.debug(`Executing ${cmdStr}`);
+    try {
+      const result = await exec(this.binaryPath, finalArgs);
+      if (logStdout) {
+        log.debug(`Command output: ${result.stdout}`);
+      }
+      return result;
+    } catch (e) {
+      throw new Error(`'${cmdStr}' failed. Original error: ${e.stderr || e.stdout || e.message}`);
+    }
+  }
+
+  async listProfiles () {
+    const {stdout} = await this.execute(['profiles', 'list']);
+    return JSON.parse(stdout);
+  }
+
+  async installProfile (opts = {}) {
+    const {
+      profilePath,
+      payload,
+    } = opts;
+    if (!profilePath && !payload) {
+      throw new TypeError('Profile must be defined');
+    }
+
+    if (profilePath) {
+      await this.execute(['profiles', 'install', '--path', profilePath], {
+        logStdout: true
+      });
+    } else {
+      const tmpRoot = await tempDir.openDir();
+      const tmpProfilePath = path.join(tmpRoot, 'cert.pem');
+      try {
+        await fs.writeFile(tmpProfilePath, payload, 'utf8');
+        await this.execute(['profiles', 'install', '--path', tmpProfilePath], {
+          logStdout: true
+        });
+      } finally {
+        await fs.rimraf(tmpRoot);
+      }
+    }
+  }
+
+  async removeProfile (name) {
+    await this.execute(['profiles', 'remove', name], {logStdout: true});
+  }
+}
+
+export { Pyidevice };
+export default Pyidevice;