In some situations you can’t or don’t want to take a call. Choose how CSF should respond for you: Block calls with a busy signal? Reply by auto-SMS? Forward calls and SMS to someone else? CSF will help you do all this and more: create black- or whitelists, block hidden numbers, schedule filters. Call & SMS Filter is offered for download as a fully-functional trial version, limited to 20 blocked calls/messages. After the expiration of the trial period, the application will request a license. The license is based on the unique device IMEI and cannot be retrieved and applied to other handsets.