Which is exactly what they have been doing. The only problem is, you can't do all the systems at once. They don't have the money, manpower, or the availability of parts. We were dual 550 Mhz here on the South Oakland system with the rest of Metro Detroit at 860Mhz (single cable). We didn't even have Digital Phone service until the 1Ghz upgrade and it took well over a year for them to complete it for the six communities that make up the South Oakland system. They literally had to touch every piece in the network. Every node, every amp, most if not all the trunk cable, and every last tap as none of it would run at 1Ghz. It takes awhile folks.
“An engineer explained to us that hundreds of ear impressions were gathered in the name of research, and while each one obviously boasted its own unique shape and size, one single characteristic remained uniform across the board: the entrance into the ear canal is not a perfect circle, it's an oval.”
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Which is exactly what they have been doing. The only problem is, you can't do all the systems at once. They don't have the money, manpower, or the availability of parts. We were dual 550 Mhz here on the South Oakland system with the rest of Metro Detroit at 860Mhz (single cable). We didn't even have Digital Phone service until the 1Ghz upgrade and it took well over a year for them to complete it for the six communities that make up the South Oakland system. They literally had to touch every piece in the network. Every node, every amp, most if not all the trunk cable, and every last tap as none of it would run at 1Ghz. It takes awhile folks.