HSPA+ 42 data speed on Tmobile.
04-13-2014 06:54 PM
- I'm consistently pulling 20Mbps down and 1.5-3.5 Mpbs up on T-Mobile in DC and Northern Virginia - when I have a signal. Looking forward to receiving my Straight Talk SIM this evening so I can compare. As I said on another thread, I expect I'll sacrifice some speed for better coverage and building penetration on AT&T's network.11-21-2012 01:46 AM
Sent from my Nexus 7 using Tapatalk 211-21-2012 01:47 AMLike 1
Consider a hypothetical town being served by a single site (tower) and this is a strange tower with a single geographic sector. One company deploys EVDO-A there, one deploys HSPA+ and one deploys LTE (SISO). The EVDO-A company happens to have 40 MHz available for forward channel (all of them are frequency duplexed), HSPA+ has 20 MHz available and LTE company 5 MHz available. Also presume that streaming HD youtube takes
EVDO company can deliver about 96 mbps, so could support (at 2 mbps per stream) 48 users streaming HD YouTube.
HSPA+ company can deliver about 84 mbps, so could support 42 users streaming HD YouTube at the same time.
LTE company can deliver 27 mbps (really about 22 mbps), so could support 13 users streaming YouTube.
Which is the better technology? It doesn't matter, the company with the most spectrum is winning, even though EVDO-A is using a lower order modulation.
So, let's say you are the HSPA+ company and you want to win. You have 20 MHz of spectrum and you've currently got HSPA+21 deployed, so that means you have 4 carriers each delivering a possible 21 mbps. What does upgrading to DC-HSPA do for you? In terms of the metric above, nothing. The tower is still delivering 84 mbps, it's just that each individual user can now receive up to 42 mbps rather than 21 mbps. What would upgrading to LTE do for you? If you deployed LTE in all 20 MHz you'd have a theoretical bitrate of about 108 mbps, but subtracting coding and control you're down to about 87 mbps - not all that much better than your position with HSPA+21 or DC-HSPA+42, and also you had to change out your equipment at the tower. LTE is really only a little bit better if you keep things "fair" meaning SISO LTE vs SISO HSPA (there are other advantages not associated with theoretical maximum performance, but I think those advantages could be had in more advanced HSPA+ deployments too).
Another option would be to go DC-HSPA+84 MIMO, which would change the metric above so that you're delivering 168 mbps from the tower in 20 MHz and could support 84 users streaming HD YouTube at the same time. This has a lot of nice advantages - voice calls already work over HSPA and you could use every last kHz you have available for HSPA - LTE and EVDO carriers have to keep legacy technologies around to support voice calls at the moment. All of your old HSPA devices will still work, DC-HSPA-MIMO is backward compatible. And, of course, your users can just order a Google Nexus 4 and put it on your network.
It's sort of interesting that T-Mobile went with DC-HSPA rather than HSPA-MIMO, as HSPA-MIMO would have approximately doubled tower throughput while going DC-HSPA doesn't change anything to tower throughput (actually about 10% from improved efficiency), the only advantage is that the end user sees. However, going with MIMO would have required more physical antenna on the tower, and there would be cost associated with that, so that might have been the reason, however if T-Mobile's long term plan were to stick with HSPA there wouldn't be a reason to avoid that upgrade, as the future very-high-speed paths require MIMO anyway.11-21-2012 02:09 AMLike 4
- i happened to do add'l testing today, as i'm monitoring T-Mo 1900 band migration in Atlanta.
2 weeks ago, Sandy Springs, GA testing consistently at 8Mbps DL about mid morning
2 weeks ago, Smyrna, GA testing consistently at 3Mbps DL about early evening
Today, Sandy Springs, GA testing consistently at 5.5Mbps DL about mid afternoon
That was all on a Pre3 (HSPA+) on T-Mo's 1900 band.
Also today, on an ATT LTE demo in their store: 20Mbps about mid afternoon.
Sprint EVDO usually tests just under 3Mbps IIRC, just like Valeuche said above.
Also, when I go out of range, T-Mo drops to Edge indicator on the Pre3, but the Pandora keeps streaming. I've streamed Pandora over Edge for a while. But there's an issue with the Pandora app i swear. it keeps pausing mid-song on the Pre3 about every 15 mins; and actually freezing on the Pre- with 6 secs remaining, about every hour. so make sure your issues are connectivity, not application. i never had probs before, but Pandora seems buggy as heck now.11-21-2012 02:39 AM
- 11-21-2012 03:32 AM
- 11-21-2012 07:24 AM
- 11-21-2012 07:59 AMLike 1
- Hey, I'm in North San Diego County... so far, I like what I see.. and I included a screenshot of Speedtests from my desk on my Evo LTE that I love.. but... the speed comparison is a joke. Sprints 3G really is atrocious... with no LTE in sight. For Comparison, the first and last tests on the Nexus were from my desk as well. The others were in Carlsbad, CA.11-21-2012 10:57 AM
- 11-21-2012 11:21 AM
- Too lazy to post a screenshot.
Los Angeles 90024 (Westwood). Signal around -90dBm (4 bars), average of 3 tests run around 6pm PST today is 16Mbps down and 2.8Mbps up. Hell yes!
My Exhibit II, which is supposedly an HSPA+ device as well got an average of 3.5Mbps down and 2.5Mbps up. Same SIM, exact same spot.11-21-2012 12:01 PM
- Keep in mind you don't get any data roaming on TMobiles Monthly 4G no contract plans. It's in the fine print. My wife has Monthly 4G and I'd switch to one of those plans today but we spend a lot if time in rural areas. I'm on Sprint and have 3g data in many places she doesn't because of no roaming.11-21-2012 12:37 PM
- In Redwood City, CA (6 or so miles from the Googleplex ) after a half dozen tests over the last 24 hours I'm getting a low of 14.07 down/2.02 up and high of 15.84 down/3.06 up using a T-Mobile sim.
We're road-tripping up to Oregon this afternoon, I'll be curious to check the coverage as we leave the Bay Area.11-21-2012 01:22 PM
- I'm in Oakland, CA. I just got my Nexus 4 this morning and popped in my Prepaid 30 a month T-Mobile Sim and so far haven't been having too great an experience. At first it didn't even recognize the Sim until it updated to 4.2 and reset. Now, so far it says it's in HSPA (little H by the bars), but the speeds have been pretty bad. I've had 3263kbps, 429 kbps, 2808 kbps and 592 kbps, testing in my home in Oakland, then a couple times on the road driving east to Pleasanton, and now in my office in Pleasanton, it actually reads as Edge. When I check T-Mobile's coverage map it shows all those areas as "Excellent" coverage. Is there an easy way to see if I'm actually getting 42Mbps HSPA+ or not aside from a speed test?11-21-2012 06:37 PM
- I'm at the very edge of coverage about 20 miles outside of Portland, Or. metro. My in town download speeds have averaged 12 Mbps down. (This would be around Tigard, Beaverton, Tualatin) Outside of town I still get 4Mbps down on average and I'm litteraly 1 bar in the house and 3 bars outside. So all in all considering my home location, I'm quite impressed with Tmo's coverage. My last ATT phone I had to stand in my front yard, hold the phone up and be very very quiet.... I'm hunting for a signal bar. The CDMA networks similarly have terrible coverage where I live.11-21-2012 11:25 PM
- I'm at the very edge of coverage about 20 miles outside of Portland, Or. metro. My in town download speeds have averaged 12 Mbps down. (This would be around Tigard, Beaverton, Tualatin) Outside of town I still get 4Mbps down on average and I'm litteraly 1 bar in the house and 3 bars outside. So all in all considering my home location, I'm quite impressed with Tmo's coverage. My last ATT phone I had to stand in my front yard, hold the phone up and be very very quiet.... I'm hunting for a signal bar. The CDMA networks similarly have terrible coverage where I live.11-21-2012 11:52 PM
HSPA+42 is right up there with the fastest current mobile networks (except the newly minted, completely unloaded ones)11-22-2012 06:00 AM
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HSPA+ 42 data speed on Tmobile.
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