Pricing plans  Services  API  Partners  About the service  Contacts 
8 (800) 700 7672
Free in Russia

Questions and answers

Here are the most frequently asked questions about the service.
Please read them carefully before contacting customer support.

General questions:

1. How to start using your service
2. How to sign a written contract for your messaging services
3. Do you guarantee the safety and confidentiality of the data used when sending messages
4. Why some other services may offer prices lower than yours
5. Why does my newsletter have the status "On moderation"?
6. How can I pay for your services via the terminal
7. Why I have made the payment through a personal account, and the money for the balance not credited
8. How can I retrieve forgotten login and (or) password
9. Why some of the messages from the mailing list were transferred to the morning


10. Why has my message not been sent and has the status "unregistered sender id"
11. What operators do you work with?
12. What is the email2sms feature and how it works
13. What countries can I send messages to?
14. Why do I send one message, but the amount is deducted from the account as for two
15. What is the maximum length of sent SMS messages
16. Can I send SMS messages from my site?
17. Is it possible to set your name as the sender of SMS messages
18. What are the restrictions on using the sender's name (Sender ID)
19. What is the difference between a paid and a free letter name? (Sender ID)
20. How can I know that a sent message was successfully delivered
21. Can I send messages to short numbers
22. Why my message was not sent and has the status " Forbidden
23. What are the rules for mass advertising mailings?
24. What does the "Unable to deliver" status mean, and why is money charged for such an SMS?
25. What is HLR and what are HLR queries used for?
26. Why did I turn off the phone and the HLR request returns the status " available
27. Why does the HLR request return an invalid IMSI?
28. What is Ping-SMS and what is it used for?
29. Why do I send a message on my own behalf from the sender, and it comes from another one
30. Why did I send one SMS message, but the subscriber received several
31. What does the number in parentheses after the message status mean?
32. In what cases can the delivery of the message be delayed?
33. Why the message was not received on the phone, although the status "Delivered" was returned
34. Why are messages sent a few days ago missing from your message history?
35. In what format should the subscriber numbers be specified for sending messages
36. Why SMS has received the status "Forbidden", but after a few seconds the status changed and the SMS went
37. Do message with status "Insufficient funds" after recharging
38. What are the rules for registering transactional and service message templates

E-mail messages:

39. What kind of messages allowed to be sent to e-mail newsletters
40. How to set up the display of only my sender's address in e-mail messages
41. What is the maximum size of an e-mail message that can be transmitted
42. How to remove your unsubscribe link from an email
43. Is it possible to disable the automatic addition of your picture to the body of the message
44. Why when sending from my e-mail address, received email, the sender's address is replaced with your
45. How to send an e-mail message with an attachment using the HTTP API

Voice messages:

46. What countries can I send voice messages to?
47. Charged any money if the subscriber is unavailable, or the phone takes Voicemail
48. What is the maximum length of the audio of the message is possible
49. What types of formats for voice files are supported
50. What languages are supported for automatic voice-over
51. Why is there a substitution of the sender's phone number when sending voice messages
52. How to find out the order of digits (DTMF) that the caller pressed during the call

API, SMPP, integration:

53. Is the status transmitted to the handler for each type of sent message when using cascading distribution
54. Why can't I connect via HTTPS from the program?
55. How many numbers can be passed through the API in a single request
56. Why does the "IP address blocked" error return when making API requests?
57. How to increase the speed of mailings via SMPP connection
58. Why did the message sent via the API not appear in the message history
59. What actions do I need to perform to send messages over the SMPP protocol?
60. What is the difference between the SMPP protocol and the HTTP protocol?
61. Why does the site not open or the API connection stopped working

Incoming messages, virtual numbers, SIM hosting:

62. How to receive responses to sent SMS messages
63. Is it possible to receive incoming SMS messages through your service
64. Is it possible to receive incoming SMS messages to your phone number
65. What is the difference between a dedicated virtual number and SIM card hosting?
66. I do not receive an SMS message to the virtual number from Odnoklassniki, VKontakte, other social networks and payment systems
67. Can I organize interaction with my clients using your service

Ask another question

20032023 SMS Center LLC
License no. 166255
Design Artemy Lebedev Studio
Site Information
SMS Center for Android Yandex. Metrica