Скачать или смотреть How to send bulk SMS using your own number - Mass text

try : https://sms8.io/
Here are the steps to send bulk SMS using your own number with SMS8:

Steps to Send Bulk SMS Using SMS8
Sign Up or Log In:

Visit https://sms8.io/ and sign up for an account or log in if you already have one.
Connect Your Android Phone:

Download the SMS8 APK app and install it on your Android phone.
Follow the instructions to connect your phone with your SMS8 account.
Select the Bulk SMS Feature:

Navigate to the Bulk SMS section in your SMS8 dashboard.
Upload Your Contacts:

Prepare an Excel file with the phone numbers you want to send messages to.
Upload the Excel file in the designated area on the SMS8 platform.
Create Your Message:

Write the message you want to send. Use the %name% feature to personalize the message by inserting recipient names.
Schedule or Send Immediately:

Choose whether you want to send the messages immediately or schedule them for a later time.
If scheduling, select the date and time for the messages to be sent.
Review and Confirm:

Review your message and recipient list to ensure everything is correct.
Confirm the details before sending.
Send Your Bulk SMS:

Click the Send button to initiate the bulk SMS sending process.
Check Delivery Reports:

After sending, check the delivery reports in your SMS8 dashboard to see the status of your messages.
Tips:
Ensure your phone plan supports unlimited SMS to avoid extra charges.
Double-check your Excel file for accuracy to prevent sending to incorrect numbers.
If you have any questions or need further assistance, feel free to ask!