In the USA, foreign SIM cards and phones (except possibly those from Mexico or Canada) were disconnected several years…
In the USA, foreign SIM cards and phones (except possibly those from Mexico or Canada) were disconnected several years ago. American provider Verizon offers free service in Mexico (and possibly Canada) but only for phones purchased in the USA.
Russian mobile operators like MTS and Megafon generally provide stable roaming services in Mexico
Russian mobile operators like MTS and Megafon generally provide stable roaming services in Mexico. Specifically, connection through the local operator Telcel has been confirmed by multiple users for both calls and SMS. Potential issues include SIM card blocking due to prolonged inactivity (requires in-person restoration in Russia) or physical SIM chip failure. In cases of network connectivity issues, attempting to use VoWiFi (Wi-Fi Calling) on an Android device is a suggested troubleshooting step. eSIM reissuance requiring SMS is a circular problem if the SIM is inactive.
To access certain Russian services that may be blocked, a Russian VPN is often required
To access certain Russian services that may be blocked, a Russian VPN is often required. This implies geographical restrictions or specific network policies for accessing these services from outside Russia.
To receive SMS messages from Russian banks while in Mexico on a minimal balance, retain your Russian SIM card
To receive SMS messages from Russian banks while in Mexico on a minimal balance, retain your Russian SIM card. SMS reception generally works even on inactive or unfunded plans, as long as the number is not deactivated due to prolonged inactivity (typically 6 months, confirm with your provider). Periodic small top-ups (e.g., 50 RUB) are recommended to keep the number active. Major Russian carriers like Megafon, Beeline, and Tele2 should function in Mexico by connecting to local networks.