There are 4 ways, customer can send SMS through Goodpick SMS Gateway-

1.   Quick SMS      2.   Group SMS      3.  Bulk SMS       4.  API

Quick SMS: Follow following Step to send SMS through Quick SMS

Select Sender ID / Sender name
Select Route
Paste all content in the box.
Select SMS type (text / Unicode / Flash)
5.      Type Content or select from user templates (Pre-set SMS Content)
6.      Not change time if want to send now (Update timings if want to schedule for later submission & delivery)
Group SMS: Follow following Step to send SMS through Group SMS

Select Sender ID / Sender name
Select Route
Select Group (Already saved in Phonebook)
Select SMS type (text / Unicode / Flash)
Type Content or select from user templates (Pre-set SMS Content) 
Not change time if want to send now (Update timings if want to schedule for later submission & delivery)
  Bulk SMS: Follow following Step to send SMS through Bulk SMS 

 Select Sender ID / Sender name
Select Route
Upload Text file (.txt) or CSV file containing only Mobile no in the first column)
Select SMS type (text / Unicode / Flash)
Type Content or select from user templates (Pre-set SMS Content)
Not change time if want to send now (Update timings if want to schedule for later submission & delivery) 
API - Pls refer Download API document from your account.