data roaming will not switch on or off on 16proma

Someone else here may have a better suggestion, but most likely you'll need to contact your cell carrier about this. They may not offer data roaming for your plan or in that country, or they may need to provision your account or repair that provisioning.

Regards.

Here is what a search using intelligence has yielded:

If you're asking about a network in India that is compatible with an EE SIM card, there is no direct equivalent network in India that seamlessly works with EE; to use your EE SIM in India, you'll need to purchase a roaming add-on and expect additional charges as you'll be outside of the standard EE coverage area. 

Key points about using EE in India:

• Roaming charges:
• You will incur roaming charges when using your EE SIM in India as it's not considered part of the "Roam Like Home" zone. 
• Roaming add-ons:
• To manage costs, consider purchasing a specific roaming data add-on for India through EE. 
• Local Indian networks:
• If you need more reliable connectivity in India, consider buying a local SIM card from providers like Airtel, Reliance Jio, or Vodafone. 

My advice would be to see if you can contact EE Support online and ask them about the add-on that you will need. If that is not possible, then consider buying a local SIM card. Jio is a major provider in India.

Are you saying that you are in another country from your home country and you are trying to use another carrier's cell service?