Hey ​@sangramraut,

 I can look into this for you.
Can you please DM me your RingCentral account number and the details of your SMS campaign registration? Once I have that, I’ll check what’s going on and why it was rejected. 

Hi Mary, Thank you for responding. I noticed its approved now.  However, I am able to send messages to certain numbers and not able to send to other. Do you know how can I resolve this issue?   sent you account #

Thanks for the update, and I'm glad to hear the account is approved!

To better understand what might be happening, could you please answer a few questions for me?

• Are the numbers you're unable to message all on the same carrier (e.g., AT&T, Verizon, T-Mobile)?
• Are you getting any specific error messages when the texts fail to send, or do they just appear as "undelivered"?

1. I tested sending messages to ATT and T-Mobile. Its taking 8-10 min to get the message delivered. I am not able to send to Verizon number I tried. I am getting an error message saying ‘Sorry, we are having trouble sending your message. Please try again’.  
2. Not getting ‘undelivered’ as of yet. 

Thanks for clarifying, ​@sangramraut! Let’s continue our conversation thru DM.