How can I send SMSes from Vtiger?

Broadly speaking, there are three phases involved in sending SMSes from Vtiger CRM. 

1. First and foremost, you need to first sign up with an SMS provider. They will give you details like authentication ID, user ID, and password. 
2. Once you receive the details, you need to set up the service provider in VTiger CRM. The following service providers are available (pre-loaded) with the CRM:
   • Clickatell (Communicator/Central)
   • Clickatell (Platform)
   • ESMSProvider
   • GupShup
   • India SMS
   • LabsMobile
   • MobileMessenger
   • MSG91
   • Mvaayoo
   • NRSGateway
   • SolutionsInfini
   • SMPP
   • SMS99
   • TextAnywhere
   • TextLocal
   • Twilio
   • ZoomConnect
3. Once the above are carried out, you can send an SMS from any record to which a contact or an organization is related. For example- Contacts, Quotes, Deals, Invoices, etc. Follow these steps to send an SMS:
   1. Hover over a contact, organization record in the List View and the SMS icon () becomes visible. 
   2. Click the SMS icon to open the Send SMS window.
   3. In the Send SMS window, click the Select Phone Number field to display the available phone number.
   4. Select the phone number you want to send the SMS to.
   5. Type the message you want to send.
   6. Click the Send button.

Note:

• You can send an SMS only to mobile phones.
• Ensure that phone numbers are saved in the international E.164 format.
• SMS service providers need to be configured for your contact before you can send an SMS. 
• Any message you send will have a character limit of 160. Anything above this will be sent in a subsequent message.