What you need to know is that it doesn't matter if your Whatsapp number database business doesn't operate in the EU. You're under the law's jurisdiction as long as you have some data on EU citizens. So what this means is that you need to have Whatsapp number database transparency in terms of how you collect data and how you intend to use it at the very least. Other things you need to show will include the users that agreed to opt-in to your data collection and how long you intend to hold their information. You need to ensure that you gave your user's Whatsapp number database the ability to opt-out and give them access to their collected data when they demand it.
If you use the detailed targeting Whatsapp number database features within Facebook, you don't need to worry about compliance. Facebook becomes the controller of data and it becomes its responsibility to ensure that the data you use is compliant Whatsapp number database with the regulations set by the GDPR. The Facebook Lead Ads and Facebook Whatsapp number database Custom Audience Become More Complicated When you run Lead Ads that ask for the users' personal data or you upload on Facebook lists of users to create a Custom Audience these Whatsapp number databases are the only times you become a data processor.