Of course! Uptics has the same feature for SMS as it has for Email Sending, in which you can select one or more phone numbers from your account to send out SMS messages.
Within the Sequence Builder, to use this feature simply multi-select any purchased phone number from the dropdown under the 'Send SMS from' settings, and the sequence will automatically rotate and balance out the sends across the various phone numbers you have selected.
If you are looking to send out SMS messages from your sequence(s), please be sure to read about and register your brand and campaign so that your messages don't get blocked and get delivered to your recipients.