An eSIM is a digital SIM card, the successor to a traditional physical SIM card. At UNDO, you don’t pay any costs for this type of SIM card. Thanks to an eSIM, you can start surfing, calling and texting within minutes after you ordered. Note: not all phones support an eSIM. Devices that do, also offer room for a physical SIM card. With such a Dual SIM device, you kill two birds with one stone. You can use two numbers, and therefore two subscriptions. Compared to a traditional physical SIM card, an eSIM has many advantages:

• You can easily switch between 2 numbers if you have a Dual SIM.
• So you decide for example which number you call with, and which number you surf with.
• Outside the EU, you can easily use a local SIM card.
• Smartphone lost or stolen? Then activate a new eSIM in 1-2-3 in your replacement device.
• No need to change physical SIM cards anymore.
• You choose a more environmentally friendly alternative.