**What it does:** Send bulk SMS and MMS messages using your Android device.
**Key Features:**
- Bulk SMS/MMS/USSD messaging
- CSV/Excel import for contacts
- Auto-responder
- Scheduled messages
- Delivery reports
- Multiple device support
- API access
**Requirements:**
- Android device with SIM card
- Active mobile data/WiFi
- App installed on device
**Costs:**
- No additional SMS costs (uses your mobile plan)
- Your carrier's SMS rates apply
**Best for:** Local marketing, customer notifications, appointment reminders
**Access:** [sms.sociostacks.com](https://sms.sociostacks.com/)
**Learn more:** [SMS Tool](https://sociostacks.com/sms.html)