Mobile internet roaming options

Major mobile operators in South Korea (KT, SK Telecom, LG U+) offer similar quality and coverage. Travelers can choose based on specific plan details and personal preference. LG U+ and KT are mentioned as reliable options.

For telecommunication needs in South Korea, purchasing a local SIM card or eSIM is highly recommended over using Russian roaming services due to cost-effectiveness. Options are available on platforms like Trip.com. If your phone supports eSIM, consider an 'Asia' plan which covers transit stays (e.g., in China) and the duration in South Korea. Alternatively, obtaining a separate Chinese SIM for transit and then a Korean SIM is feasible. Local SIM cards typically cost around 35,000 KRW per month and offer stable connectivity without the need for VPNs.

Using Russian SIM cards (e.g., Beeline) with roaming services in South Korea generally does not require a VPN for most internet activities. However, if phone calls are essential for work, a roaming plan might be necessary as relying solely on internet-based communication might not suffice.

For issues with international roaming on a Russian phone number, it is advisable to contact the support line. Contact information is usually available on the service provider's cards.

When using an eSIM in South Korea alongside a physical Russian SIM card, ensure the Russian SIM is active for cellular service/SMS but disabled for mobile data. This allows receiving banking SMS while utilizing the eSIM for high-speed internet data.