What R new ways to reach SELLERS now that FCC has shut down SMS?

[Lee Bailey]

Our CRM company dropped the SMS bomb on us yesterday..."The TCPA requires that a business must receive express written or opt-in consent from any contact before it can legally start sending them SMS marketing messages. Such consent must be “clear and straightforward” and not hidden within a lengthy terms and condition policy"...I think our CRM company fought long as they could by given people the chance to opt-out of SMS text but now they have told us that its out of they hands now , they have to comply if they wanna stay in business. We've pretty much built our business using SMS... Any creative ways to get an opt-in other than post cards, letters and signs?