When signing up for any kind of service, you always need to have a clear
the water” first and determine the effectiveness of an SMS campaign amongst your clientele, it will be in your best interest to choose a service provider that doesn’t have minimum purchase requirements. This way you can experiment and add or subtract from your SMS campaign.
Another important question concerns time limits. Do you have to use your SMS purchase within a specific timeframe, or does it roll over to the next month? If your credit expires quicker than you can use it, you might want to look at a SMS gateway services provider with more leeway when it comes to message expiration.
Protect your interest. Ask for all costs pertaining to SMS gateway services to be explained in detail before you accept a contract from a provider.