ShopApplies to: COLDCARD Q, Mk5, and Mk4
Verified on: July 17, 2026
Record the COLDCARD model, firmware version, exact message, and what happened immediately before the problem. Do not wipe, reset, restore, or load different firmware until you understand how that action affects the current wallet and its backups.
Known symptoms and warnings
Check the official troubleshooting page for PSBT warnings, power behavior, network mismatches, legacy keypad issues, and other known cases.
Common questions
Check the current FAQ for setup, connections, backups, transactions, purchasing, and general product questions.
Confirm model details
Use the model page and specifications before following a connector, power, menu, or firmware instruction.
Contact support
If the official pages do not resolve the issue, send the model, firmware version, exact message, and non-secret reproduction steps.
Never send support your seed words, PIN, passphrase, backup password, private key, wallet backup, XPUB, descriptor, or funded PSBT. Remove addresses, transaction details, device identifiers, and personal information unless support specifically needs a non-secret example and you understand the privacy impact.