Twe2 is one service which does this job absolutely free. Twe2 – Get Twitter alert via sms which includes message sent to you, direct messages and any search terms which you had set. The keyword search is pretty useful integration.
Features:
- @ and direct messages delivered via sms. You can also add search terms.
- Select which days of the week you would like to receive sms alerts. You can add your time zone at this place so you get the message in right time.
- Configure how many sms you would like to receive every hour.
- You get a stats dashboard which tells you how many message had been sent in last hour, this month and this week.
- Supported in 98 countries. You will have to register your mobile number with them. Once registered, a confirmation code is sent to you which you will have to add it in your account.
This service is free to use but to support it adds small advertisement in your SMS.
Give Twe2 a try