Find your symptom
Phantom's help center has no single "not working" page. It documents specific cases, listed below.
Ledger will not connect or sign
For the mobile app, Phantom's checklist is: restart the app, turn on Bluetooth on both the phone and the Ledger, and give Phantom Bluetooth permission. Keep the Ledger unlocked on its home screen, update the device firmware and the chain app, and re-pair the device after forgetting it in Bluetooth settings. If a transaction fails or never prompts for approval, open the Solana app on the Ledger and turn on blind signing for that app, then retry.
Transaction is pending or failed
Check the transaction in Phantom's history and on a block explorer. If it failed, the tokens did not leave your wallet. On Ethereum, Base, Polygon and Sui, low fees can leave a transaction waiting, and Phantom says you can resubmit with a higher fee or cancel. Phantom recommends keeping at least 0.01 SUI for Sui gas.
Funds have not arrived
When you sent from an exchange, common causes are an unsupported token, the wrong network, a wrong deposit address or a missing memo. Phantom cannot reverse or credit exchange deposits. If the transaction succeeded on-chain but the token is missing, check your hidden token list.
"Feature is unavailable" or "Transactions Disabled"
This means your address is restricted, either by regional limits or for a Terms of Use violation. Your funds stay accessible. Phantom's suggested fix is to export your recovery phrase or private key and import it into another compatible wallet such as Solflare, MetaMask, Rainbow or Backpack. Only do this on a device you trust and never share the phrase with anyone.
Compare wallets on the wallets page, or read about Phantom.