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Miễn phí hướng dẫn, cài đặt và giao hàng tận nơi.
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T-Mobile WebConnect Rocket 21 Mbps
USB 3G STICK Modem
Mã sản phẩm: USB3G T-Mobile WebConnect Rocket 21.6 Mbps
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Giá: 1.250.000 vnđ
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| Bảo hành: |
6 tháng |
| Support Network: |
HSPA+ 21.6 Mbps |
| Support Network: |
HSDPA / HSUPA / WCDMA / UMTS / 3G
/ EDGE / GPRS |
| Support OS: |
Windows (2000, XP, Vista, 7) 32 bits, 64 bits hoặc MAC OS |
| Maximum Speed: |
Download Max: 21 Mbps - Upload Max: 5.76 Mbps |
| Loại sản phẩm: |
USB Modem - Hàng chính hãng của tập đoàn T-Mobile USA. |
| Màu sắc: |
Black - Metal |
Thông tin mô tả:
- Slimmer HSPA+ Stick 21 Mbps
- HSDPA data transfer speed up to 10.8 Mbps
- HSUPA data transfer speed up to 5.76 Mbps
- Micro SD Card Slot (support 8 GB)
- Plug and play
- WCDMA, HSDPA/UMTS 2100MHz
- Dimensions: 77 x 28 x 12 mm
- Weight: 30g
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Hộp bao gồm:
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Thông tin mở rộng:
WebConnect Rocket is a relatively nondescript modem with a slide-out USB jack and both Windows and Mac-compatible software. The Rocket has a MicroSD card slot to act as a card reader, and a port for attaching an external antenna. These are standard features for a USB modem.
The software is the usual stuff from Smith Micro, a bit gummy to use but basically functional. The real news here is that this is the first modem to support HSPA+, a new variety of 3G that T-Mobile is rolling out across the country this year.
T-Mobile's version of HSPA+, in theory, allows speeds of up to 21 megabits down and 5.8 megabits up. HSPA+ actually boosts the speed of all 3G devices, but it takes a true HSPA+ device to reach maximum speeds. Where HSPA+ isn't available, the WebConnect Rocket falls back to T-Mobile's HSPA 7.2 network.
When I tested a beta version of the Rocket, HSPA+ was only available in Northeast Philadelphia. T-Mobile says HSPA+ will cover most of their network by the end of 2010.
Speed Test
HSPA+ was reliably faster than WiMAX in T-Mobile's Northeast Philadelphia test area. Outside the HSPA+ bubble, the WebConnect Rocket acquitted itself very well, getting higher speeds than the older WebConnect stick on T-Mobile's HSPA 7.2 network.
In HSPA+ mode, I got an average of 3.1 megabits down, with a peak at 7.7 megabits. Uploads zipped along at an average of 1.26 megabits down, with a peak of 2.02 megabits. That compared favorably with the older WebConnect stick (which averaged 2.57 megabits down and 798 kilobits up) and with the best WiMAX device, the Sprint U301 (2.25 megabits down, 708 kilobits up.)
In HSPA 7.2 areas of Philadelphia and New York City, T-Mobile's network was slower than Sprint's 3G network, but the Rocket was still faster than the older WebConnect stick. With the Rocket, I got an average of 586 kilobits down and 948 kilobits up; with the WebConnect, I got 431 down and 740 up.
HSPA+ has the speed of wired broadband, but it doesn't have the responsiveness. While loading Web pages felt fine, I got on average 104 ms pings, which are too slow for multiplayer gaming, for instance. I've never seen a cellular network with a better result, but my wired office network has a 17 ms ping time as measured by pingtest.net.
The Promise and Peril of HSPA+
Three megabits looks great, but what about the 11 that HSPA+ promises? T-Mobile representatives told me HSPA+ connections only reach their top speeds when downloading very large files - 500MB, for instance. But that's a very bad idea on T-Mobile's current service plan, which, like AT&T's and Verizon's plans, only allows you ten 500MB downloads a month before you get cut off or charged astronomical overage fees.
Other applications which require fast connections, like HD video streaming, could also bust the bit bucket pretty quickly. (An hour of Hulu is about 300MB, according to Hulu's support boards.) Carriers say that very few users ever hit that 5GB limit. But I wonder if that will be the case with these new 4G and 4G-esque technologies. After all, if T-Mobile themselves are exhorting me to download 500MB files, it's hard to criticize users who then tap into YouTube HD, Hulu or even BitTorrent on their new HSPA+ links. And whether or not they ever hit it, the 5GB limit will loom nastily over the head of anyone doing high-bandwidth activities, causing video watchers to keep looking back over their shoulders. That's not a fun experience.
If T-Mobile intends to keep the cap, they'll need to give users an immediate, graphical and continually updated reassurance that they're not hitting their limits in the middle of an episode of LOST HD.
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