To activate an Orange Prepaid Top Up, you'll need to follow these general steps:

1.Purchase the Orange Prepaid Top Up voucher or digital code. You can buy these from various retail stores, Orange stores, or online.

2. Dial the Orange top-up activation code. The code is usually provided on the voucher or digital code. For example, the code may look something like this: 125#.

3. Press the "Call" or "Send" button on your phone. This will activate the top-up and add the credit to your account.

4. Wait for the confirmation message. Once the activation is complete, you should receive a confirmation message from Orange, letting you know that your credit has been added.

Note that the specific steps for activating your Orange Prepaid Top Up may vary depending on your country and region. It's always a good idea to check with Orange customer support or refer to the instructions provided with your top-up voucher or code for more detailed information.