Multi Short Message Service is an automatic group sms application which enables you to send multi sms to large amount of recipients.
MSMS sending panel allows tracking sent or not sent group sms
Moreover in case where the sms was not sent to some of the recipients application will ask whether you want to try sending the sms again.
The group of recipients may be created from phone contacts / groups or textcsv file.

Try before buy -

https://play.google.com/store/apps/details?id=com.MSMS

Features :

✔ Create sending lists from phone contacts / groups TEXT and CSV file .
✔ Tracking MSMS panel (freeze sendingcontinue sending laterview number of sent/not sent)
✔ Background service keep working with other applications while MSMS sending messages.
✔ Sending multi SMS to unlimited amount of recipients .
✔ Load/Save sending list from text or csv file .
✔ Send Scheduled group SMS.
✔ Edit existing sending list
✔ Send MSMS as personal SMS (Hi "fn" i have new phone number = Hi Dana i have new phone number)
✔ Control the delay time between each SMS
✔ Support Turkish language characters this feature will enable sending MSMS with 160 characters in only 1 part instead of 3 .
✔ Managing multiply MSMS for feature use .
✔ Write sending progress log file
✔ Delete messages from device outbox
✔ Mix sending lists

-Bug reporting can be sent to : ‫[email protected]‬