Firmware Update to version 4.00.02 for NW-ZX500/NW-A100 series

Sony has released a new update for the A-Series and ZX-Series Walkmans. The firmware update brings the models up to 4.00.02. The following models are supported:

• NW-A100TPS
• NW-A105
• NW-106HN
• NW-ZX507