How reliable and safe is it? What if a Tangem сard stops working?

Tangem Wallet is a highly secure and reliable hardware wallet. The chip in your card is a microcomputer that generates a private key that never leaves the card. We have gone the extra mile to prove it externally:
• The highest certification level among direct competitors that ensures no backdoors: EAL6+ by Common Criteria. This is the same level of chip protection used in passports.
• The firmware has been audited by the world's top laboratory, Kudelski Security.
• The only hardware wallet with the highest possible IP68 protection rate against environmental conditions. It is entirely safe from dust, water, and hacking attempts.
• The card is durable enough to perform from -25 ℃ (-13 ℉) to +50 ℃ (122 ℉). You can even put it in the snow without repercussions.
• The chip is designed to sign an infinite number of transactions with a life expectancy of 25+ years.
• The chip is further protected against EMPs (electromagnetic pulses), ESD (electrostatic discharge) and X-rays in compliance with the ISO 7816-1 standard.
Moreover, we have issued more than 800,000 cards since 2017. There have been no defects, and all the cards are still functioning.