Siempo is designed to fully replace your primary smartphone. However we understand people may require uncompromisable access to certain features or apps that we are not launching with, or do not feel ready to make the full switch. Siempo may be a better complementary device for you, whether as a nights and weekends phone when you want to be more present, or as a work phone so you can better focus at the office. Certain carriers support having multiple SIM cards with the same phone number (e.g. T-Mobile Digits in the US), but others would require manual SIM card switching to accommodate the complementary use case well.
If you do replace your current phone, we recommend donating your old phone to an organization like Rainforest Connection (www.rfcx.org), a non-profit using upcycled mobile technology to monitor and protect remote forests, enabling real-time interventions.