You'll need to have a French payment system for it. Unfortunately, most operators ban foreigners from subscribing to a contract. This is because many locals prefer contracts (called forfaits, see below) to prepaid SIM cards. You may notice, that prices for data on prepaid are somewhat higher in France than in most other European nations. Other providers are virtual mobile operators (MVNOs) or other resellers of the MNOs. There are 4 physical network operators (MNOs) in metropolitan France which are listed according to history and their number of subscribers: 10 Réglo Mobile (formerly Leclerc Mobile).5.7.2 Getting the SIM at their automated vending machine.5.7.1 Getting a SIM or eSIM card online.5.5 Prepaid Plan (non-rolling contract).4.3 EU roaming (My European SIM initial plan only).3.4 EU roaming (no prepaid data roaming).2.5 Orange online account ( Espace client).