Thanks to Keisha Long from DHEC for this information:
In this age of social distancing, working from home, schools switching to online classes, and visiting loved ones by electronic devices, virtual tools and the internet are more important than ever. Below are some options:
AT&T – https://www.att.com/shop/internet/access/#!/

photo by Jacqueline Kelly
In response to the public health crisis, Access from AT&T is temporarily offering two months of free service to new Access customers who order by April 30, 2020 with $5/mo or $10/mo thereafter, depending on your speed; Expanding eligibility based on income and to households participating in National School Lunch Program/Head Start; and Waiving all home internet data overage fees
Comcast – https://corporate.comcast.com/covid-19
Comcast has opened its Xfinity WiFi Network Nationally for Free, is offering Unlimited Data for Free, more
NetZero – https://www.netzero.net/start/landing.do?page=/fd/landing/landing-new&refcd=FDFEB2018
NetZero’s free package provides 10 hours of internet access with no cost and the broadband plan provides 200 MB monthly data for free
FreedomPop – https://www.freedompop.com/
FreedomPop offers free internet access with their plans. After the free data is used up, you can opt for their paid plans to get further internet access.
Spectrum – https://www.spectrum.net/support/internet/coronavirus-internet-offer-students/
Beginning Monday, March 16, Spectrum is offering free access to internet and WiFi for 60-days for new Pre-K to 12, college student and teacher households who don’t currently have internet or WiFi service. This discount will be applied as a credit for your first two months of internet services. They’ll waive any installation or pre-payment fees to help get you started.