Federal regulators are attempting to head off ELD violations by urging carriers to plan ahead for the shutdown of third-generation (3G) mobile technology by major cellular companies.
Wireless providers such as AT&T and T-Mobile are phasing out 3G to make space for 5G. ELDs that are only compatible with 3G will no longer be able to transmit data to the back office or roadside law enforcement — effectively rendering the ELDs obsolete and eventually landing them on the Federal Motor Carrier Safety...
https://www.freightwaves.com/news/fmcsa-warns-carriers-on-eld-data-services-shutdown