Telcos already do it now in some markets.  Example Malaysia has...

Telcos already do it now in some markets.  Example Malaysia has a specific plan/sim for migrant workers (indo/nepal/bangladesh/indians).  What comes after the plan is the digital offerings, so they are partnering with local companies in providing relevant content to the workers.  Ooredoo does this in Qatar - Kuwait etc.  Another example is Music Nepal on youtube, they have 3.2m subscribers - generating cash via youtube ads and now launched their Music/VOD.  Mint UAE - targets these specific migrant workers as they cant access bank accounts in UAE so they have a mobile wallet/mastercard debit card and have 450k subscribers that have their monthly salaries deposited into this account (150m usd per month).   Malaysia has a similar product Merchant trade which also doubles up as a MVNO (1m subs).  Each market is different but you can specifically target nationalities on the telco if you have a relationship with the telco.