Enter an Activation Code in the Acceptance Devices App {#semi-integrated-solution-ad-app-enter-activation-code}
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Before activating a terminal, you must generate a terminal activation code for the device in the `Business Center` or by using a REST API request. The activation code is valid for 24 hours. Follow these steps to enter a terminal activation code in the Acceptance Devices app.

1. On the Device Activation screen, enter the activation code that you generated. Tap Continue.  
   ![](/content/dam/documentation/cybs/en-us/topics/payments-processing/card-processing/semi-integrated-solution/images/sis-activating-terminal-1.png/jcr:content/renditions/original)
2. When the activation code is accepted, the Activation Successful screen appears. Tap Confirm.  
   ![](/content/dam/documentation/cybs/en-us/topics/payments-processing/card-processing/semi-integrated-solution/images/sis-activating-terminal-2.png/jcr:content/renditions/original)

#### AFTER COMPLETING THE TASK

If you are using the app in Local mode with Mutual Transport Layer Security (mTLS) enabled, you must activate a secure mTLS connection between your point-of-sale (POS) system and the Android device in the Acceptance Devices app. See [Activating a Secure mTLS Connection](/docs/cybs/en-us/sis-pax/integration/all/rest/sis-pax/semi-integrated-pymnt-svcs-intro/sis-activate-mtls-connection-intro.md "").  
If you are using the app in Local mode with Transport Layer Security (TLS) enabled or in Cloud mode, you must start the Acceptance Devices app server. See [Start the Acceptance Devices App Server](/docs/cybs/en-us/sis-pax/integration/all/rest/sis-pax/semi-integrated-solution-pax-get-started-intro/semi-integrated-ad-app-starting-server-intro/semi-integrated-ad-app-start-server.md "").