Short-Term vs Long-Term Premium Numbers: Start by Answering "Will You Need to Receive Another Code Later?"
Choosing short-term or long-term depends on two things: whether the account will trigger SMS verification again, and whether the target platform blocks VoIP and non-mobile numbers by line type. This article gives the decision order, applicable scenarios and boundaries for each, key renewal points for long-term numbers, and how to pick a number and receive codes after deciding.
NexSms官方博客