Transaction must be hexadecimal

lubor · February 12, 2026, 5:02am

Hello, I am not able to send any BTC transactions on the testnet after the latest update to Trezor Suite 26.1.2. I get the following error after signing the transaction: Transaction must be hexadecimal.

lubor · February 12, 2026, 5:53am

The Web Suite works well.

dk_SL · February 13, 2026, 1:01pm

Hello,

Please try the following:

Restart Trezor Suite
Disconnect and reconnect your Trezor device
Try switching networks:

Go to Bitcoin → Settings → Toggle between Mainnet/Testnet → switch back to Testnet

Ensure firmware is fully up to date

Clear Suite Cache:

Close Suite completely
Reopen it
If the issue persists, try reinstalling Suite 26.1.2 from the official source:
https://trezor.io/trezor-suite

Try Broadcasting Manually

If the transaction signs correctly but fails during broadcast, you can:

Copy the signed raw transaction (hex)
Paste it into a Testnet explorer broadcast tool (e.g., [Blockstream Testnet explorer](https://blockstream.info/testnet/tx/push))

If the transaction is truly hex-encoded, it should broadcast successfully there. If not, it confirms the formatting issue.