Change a SenderID: you can't rename an existing SenderID. To use a different name, register a new one. Refunds aren't available after registration.
How many you can have: as many as you like. Register once, use it forever, and you can copy the same SenderID across different accounts.
Transfer from another provider: you can't. Each SMS provider (reseller) holds a separate account with the telecom company, so SenderIDs can't move between providers. To use the same name here, register it with us again.
See also: register a SenderID.
+ Can I Send Link (or URL) in SMS messages?
+ Do you have contracts/monthly sending limits?
+ Can I send international/GCC SMS, and what are the rules?
+ Is it possible to change my account number?
+ I sent a message but it wasn't received. What should I do?