It was always using 4G LTE, it seems that this update switched it to T-Mobiles speeds...I'm not sure what is going on [with the new higher speeds], but it was always using LTE because that is the only radio it has for 4G.
I could not remember what that menu said, thanks for that.
Regarding the new higher 4G speeds, it might be that in some markets (locations) that Metro never had their own 4G tower hardware, and instead leased 4G bandwidth and resold it to their customers. Post-merger with T-Mobile that arrangement may have changed.
Regarding the 4G radio, even though we can rely on manufacturer-published information and FCC certification documents, that still may not provide the whole picture regarding 4G radio capability. The radio hardware in the phone may have more capacity than the manufacturer sought approval for from the US FCC.
As we've seen, 4G comes in many flavors, and each variant needs to be certified as a separate item on an FCC application. What that means is the manufacturer can build radio hardware into a phone, but not certify all of the radio capacity for use in any particular country. And that does not mean they cannot amend the application at some future date to include the formerly unapproved radio capacity.
Regarding the paragraph above; The same phone, I mean the identical piece of hardware, can be approved for two different carriers, under two different FCC applications, each with different features of the radios switched on. Which in that case is a firmware difference, not a hardware difference.
Carriers then lobby for FCC regulations that disallow a phone sold though one carrier, to have its radios activated to operate with the other carrier.
Do you ever wonder why in the US that tablets don't have 4G telephone capacity? You know, so you could buy a tablet and use it as your phone as well?
Plenty goes on behind the curtain in the telecom industry, heck in every industry, and we sleep right through it. Then we wake up and complain after it already happened.
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