Sometimes using different dAPPs (swapping, yield farming, or providing liquidity) may result in users ending up with wSOL in their wallet due to an unsuccessful transaction or other issues.
You can unwrap wSOL (Wrapped SOL) Directly on Solflare.com by clicking the UNWRAP button here on the Solflare.com Portfolio tab:
To Unwrap wSOL (Wrapped SOL) on mobile you have 2 options: