You may try to write an email/better official mail or even visit personally to local cellulars marketing teams to include wikipedia to the subscriptions. You may propose them as PR action: future-care, education-care name it. Trust me it may definetelly works.(I did it many times("tune up" some events) but I worked inside the cellular companies)
The main problem may be is to the break the "first line" of "corporative bureaucracy" defence.
It feels like this is a lost case... Since then I spent a couple months in Ecuador (and other SouthAmerican countries), and what I see, was similar:
Less fortunate people, whose (only?) entertainment is TikTok/YouTube/Facebook constantly on their phones. Well, Claro (cell provider with one of the best 3G/4G coverage on Galapagos) greets you with a Facebook(!!!) page explaining that Facebook&sister apps are brought to you for free.
There is zero incentive from any sides to fix this situation. The provider is not interested in ditching Meta, Meta is not interested in promoting anything else, and unfortunately most probably one of them (or both) already paid some gobernadores to shut up and keep the status quo of pointing people to ads, ads, and more ads.
