Vastauksen tähän kysymykseen jakoi hpguru
You can just send a message using your sim card.
Here you can see all packages. For your 4G package 19,99 you can send DATA50M to the number 15020. Ensure you have enough saldo for that. It will become usable after old package is out of service (if no package, then it will be right away for 30 days usable at 5-50 Mbps).
Saldo you can download on web page or R-Kioski.
Remember to send your sms out from a number where you want to use 4G package.
Wrong numbers, wrong packages or closed Prepaid numbers can't be refunded.
Now playing Willerz - Alpha Noise (Original MIx).