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文章阅读:国内红米K20 pro 能上 T-mobile 4G, Why?
[同主题阅读] [版面: 掌中宝] [作者:letusrun] , 2019年08月12日14:37:18
letusrun
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发信人: letusrun (Run Run Run), 信区: PDA
标  题: 国内红米K20 pro 能上 T-mobile 4G, Why?
发信站: BBS 未名空间站 (Mon Aug 12 14:37:18 2019, 美东)

朋友从国内买了K20 pro, 带到米国用T-mobile的卡,发现可以上4G的网。这是什么个
原因呢?记得国内红米标的没有B2/4。

难道会是B5?
(网上说 Band 5 (850MHz): Extremely limited use by T-mobile. Most band 5
coverage is offered by Verizon and AT&T. T-Mobile only operates LTE on this
band around the Myrtle Beach, South Carolina area.)

如果想查一下具体使用那个4g频段,应该如何查看?



--------------------------------------
国内redmi K20 pro的频段是这样的:

4G:
LTE FDD:B1/B3/B5/B7/B8
LTE TDD:B34/B38/B39/B40/B41
注:LTE B41(2535 – 2655 120MHz)

3G:
WCDMA:B1/B2/B5/B8
TD-SCDMA:B34/B39
CDMA EVDO:BC0

2G:
GSM:B2/B3/B5/B8
CDMA 1X:BC0

------------------------------------
T-mobile的频段是:

4G LTE
Frequencies that can provide LTE: Band 2 (1900 MHz), Band 4 (1700/2100 MHz),
Band 5 (850 MHz), Band 12 (700 MHz), Band 66 (Extension of band 4 on 1700/
2100 MHz), Band 71 (600 MHz)

4G (HSPA+)
Frequencies that can provide 4G: Band 2 (1900 MHz), Band 4 (1700/2100 MHz)
4G offers incredibly fast download speeds, nearly as fast as 4G LTE. 

3G (UMTS/HSPA)
Frequencies that can provide 3G: Band 4 (1700/2100 MHz)


2G (GSM, GPRS, EDGE)
Frequencies that can provide 2G: Band 2 (1900 MHz)
Voice and data services don't work at the same time when on 2G. You cannot
use data while on a call.

--
※ 修改:·letusrun 於 Aug 12 14:38:06 2019 修改本文·[FROM: 134.]
※ 来源:·WWW 未名空间站 网址:mitbbs.com 移动:在应用商店搜索未名空间·[FROM: 134.]

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