You people realize that Cingular Wireless LLC bought ATT to save their bacon right? Cingular Wireless kept the ATT name and logo because it was more widely known and Cingular was the new kid on the block. There has always been a debate on this and I personally feel that they should have ditched the ATT name and kept the name of the buying company. Ala Sprint is going away and being replaced with the T-Mobile namesake. Even still the company is Cingular Wireless LLC and all the FCC filings reflect this, just as with Verizon and GTE Mobile net.
This is why parts of ATT are not union for the same jobs and job functions and parts are. At ATT all new hires have to join the union, however this will change sometime about 2028 iirc. The fact is Cingular Wireless LLC is the reason ATT union labor has a better package then they did when they bought them It was Cingular Wireless that increased ATT newly bought divisions and elevated ATT up to Cingular Wireless benefits as ATT labor was subpar to Cingular's standards.
ATT's union labor can thank a non unionized company for buying them and increasing their benefits.