# Setup the application

In this guide you will:
1. [Request permissions](#request-permissions) needed by SDK to intercept the incoming flashcall automatically.
2. Proceed with the verification flow with the number [typed by the user](#pass-number-to-verify).


## Request permissions

MainActivity.kt
package com.sinch.rtc.flashcall.gettingstarted

import android.Manifest
import android.os.Bundle
import android.view.LayoutInflater
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import com.sinch.rtc.flashcall.gettingstarted.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    companion object {
        const val PERMISSION_REQUEST_CODE = 5
    }

    private lateinit var binding: ActivityMainBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(LayoutInflater.from(this))
        setContentView(binding.root)
        binding.initButton.setOnClickListener {
            ActivityCompat.requestPermissions(
                this, arrayOf(
                    Manifest.permission.READ_PHONE_STATE,
                    Manifest.permission.ACCESS_NETWORK_STATE,
                    Manifest.permission.READ_CALL_LOG
                ), PERMISSION_REQUEST_CODE
            )
        }
    }

    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        //We simply proceed with the verification
        VerificationDialog.newInstance(binding.phoneInputEditText.text.toString())
            .apply {
                show(supportFragmentManager, "dialog")
            }
    }

}
Although the SDK can work without all the permissions being granted by the user, for best user experience, we highly recommend requesting these as in such a case the incoming phone call can be automatically intercepted by the SDK and reported to the Sinch Platform. `MainActivity.kt` code snippet shows how to request them and proceed with the verification once all of them are granted. Permissions requested here should also be listed in the `AndroidManifest.xml` file. You can read more about Android permissions [here](https://developer.android.com/guide/topics/manifest/manifest-intro#perms).

## Pass number to verify

For simplicity we simply pass the number typed by the user without any reformatting or validation.


```kotlin
binding.phoneInputEditText.text.toString()
```

In order the verification to succeed the number must be in E.164 Format, e.g. Netherlands 0639111222 -> +31639111222. See [phone numbers](/docs/verification/android/android-phone-numbers/) section to read more about phone numbers handling. Note that as long as you're using a test account you have to add the number you're trying to verify to your [verified numbers](https://dashboard.sinch.com/numbers/verified-numbers) tab in the dashboard.

## Next steps

Once we have the number to be verified and required permissions granted it's time to initiate your first flashcall verification request!

Initiate the verification
## Additional resources

Learn more about the Verification API:

- [API specification](/docs/verification/api-reference/verification)