USCIS released the following information re: sending text and email messaging for online filings:
We are sending text and email messages between Sept. 17 and Sept. 20, 2018, about filing Form I-90, Application to Replace Permanent Resident Card online. If you are a lawful permanent resident and your Green Card has expired or is about to expire, or if you need to replace it for another reason, you may file Form I-90 online. Go to the Form I-90 page on our website to begin your online application process. If you are a conditional permanent resident whose Green Card is about to expire, do not submit Form I-90. Instead, use Form I-751, Petition to Remove Conditions on Residence or Form I‑829, Petition by Entrepreneur to Remove Conditions.