Because network slowdown happens over time. At least week's and more realistically it happens over month's.
Here in Hawaii on Oahu to be exact. The slow down to HSPA+ happened within days of T-Mobile switching on 4G LTE. I noticed it before it was actually turned on officially.
I would get 10 Mbps down and 2 Mbps up on average. Most areas that I had a good signal in, it would be more around 17-14 Mbps down and 2-3 Mbps up.
Then the talk of LTE coming to Hawaii started. HSPA was still normal. Then talk of LTE being spotted in some areas started. Once that happened with in day's HSPA went from the average from in my home 10 down 2 up, as I stated above. Went to under 2 Mbps down and under 1 Mbps up.
Now I'm not even getting 1 Mbps down or up. In my home. I can get maybe 1 or 2 Mbps down/up if I'm very close to a tower. My signal for HSPA hasn't changed, just the speeds.
As for LTE here on Oahu, it is the same as when it was first put up. Great in one area but if you walk a few feet it drops. Even when right next to a tower you're signal isn't never higher then 3 bar's. I can never seem to get a full LTE signal, if I do it's back down to 3 bars before I can blink my eyes.
I guess it would be harder to have LTE here on Oahu due to it being so open. There are no area's for the signal to relay off of. It just goes right out to sea. Then again in town it's just as bad due to that if you go into or walk/drive to another side of a building the signal drops. So maybe it as nothing to do with us being on an island.
Another thing I notice is it seems to drop to edge rather then HSPA. Then you have to wait to get HSPA again, then wait to walk or move a few feet in the right direction to pick up LTE that you'll lose again after walking another few feet.
I would like to think that T-Mobile is working on fixing this as we speak but it seems they don't think anything is wrong. At least that's what they tell me on the phone.
So now we have very slow HSPA and if you turn on LTE it's so spotty it drains you're battery. Not because LTE uses more battery but because you're phone is always looking for LTE and dropping it then reconnecting over and over.
LTE is going to drain more battery then HSPA but when it is always in and out, disconnecting and reconnecting, trying to find an LTE connection, finding it, connecting then dropping and repeating this everywhere you go. It drains 3x faster then if you just had a ok connection to LTE in the first place.
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