If you have pre-purchased a data plan and you have lost your home/primary data service, it's likely because your active Cellular Data plan has been changed to your new GigSky eSIM Plan. To set this back, you need to do the following;
- Go to Settings > Cellular.
- Tap Cellular Data.
- Select your home/primary SIM for cellular data.
If you have any further questions, please contact GigSky Support at firstname.lastname@example.org.