SMS SMPP Providers
From Kolmisoft Wiki
SMS SMPP Providers tested by Kolmisoft.
Inviosmart
http://www.inviosmart.it/en
SMPP Server: smpp.inviosmart.it:21789
Supports CallerID
Tested/working encodings: UTF8, ASCII, Cyrillic
SMSGlobal
http://www.smsglobal.com
SMPP Server: smsglobal.com:1775
Does not support CallerID
Tested/working encodings: UTF8, ASCII, Cyrillic
SwiftSMSGateway
http://swiftsmsgateway.com
SMPP Server: smsgateway.ca:7777
Does not support CallerID
Encodings: does not support UTF8, only ASCII (smsc_default/ia5)