Nokia Lumia 900 may not support T-Mobile 3G after all.

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Pocketnow has recently leaked specs for the Lumia 900. Among them is that the Lumia 900 will support the 1700MHz band.

It has concluded that the Lumia 900 will then support UMTS 3G for T-Mobile USA.

On closer inspection, however, this not be the case. You see, AT&T uses AWS for LTE, but not for UMTS.

We will take a look at the HTC Vivid and Samsung Galaxy S II Skyrocket (the only two LTE phone for AT&T at the moment) as examples. Both of these handsets uses the Qualcomm Snapdragon processor.

Both handsets support the 1700 Mhz band for LTE, but not for UMTS and as a result will not work on T-Mobile's UMTS network.

In addition, there has been little evidence that there exist Snapdragon processor that support pentaband.

As a result of this whole investigation and to the dismay of many T-Mobile customers, I have to conclude that the Lumia 900 will likely NOT support T-Mobile 3G.

Originally Posted by day2die

On closer inspection, however, this not be the case. You see, AT&T uses AWS for LTE, but not for UMTS.

That is not correct... T-mobile uses the AWS band (1700/2100) for it's UMTS network.

AT&T has never used the AWS band and after the failed merger is required to give some of it's AWS spectrum to T-Mobile as compensation. AT&T uses the 700 MHz band for it's LTE network.

If I remember correctly, there are no integrated LTE radios curently. The current crop of LTE phones have a separate LTE radio to complement the GSM/UMTS radio therefore, if the Ace actually does comes with a pentaband radio, it still is possible the AWS band will support T-Mobile's AWS UMTS network.

You are both right, at&t uses both the 700MHz and 1700MHz bands for its LTE network, as mentioned in this article http://www.theverge.com/2011/12/16/2...lte-850mhz-fcc. Remains to be seen what the 900 actually supports but if it was designed with the falied merger with Tmo in mind the 1700 band may not be used for LTE but could have been intended for Tmo compatibility. The 710 coming to Tmo next week has support for at&t's network so its possible the 900 was designed with the same intent. We'll know soon enough.

I thought the AT&T - T-Mobile Merge has been cancelled?

It is cancelled

If the Lumia 900 uses the Qualcomm MDM9200 LTE modem and is anything like the HTC Vivid, its support band might look like this:



As you can see, the HTC Vivid support AWS, but only for LTE.

I hope that I am wrong for the sake of all the T-Mobile users that want the Lumia 900.

I am relatively new to WP7, and I am looking for a new high end device.

Since my country only has 3G, is there an (upcoming) device that is on par with the Lumia 900 that supports 3G?

Thanks.

Originally Posted by Tsury

I am relatively new to WP7, and I am looking for a new high end device.

Since my country only has 3G, is there an (upcoming) device that is on par with the Lumia 900 that supports 3G?

Thanks.

Don't worry. I am 99.99% sure that the Lumia 900 will be available in Europe.

According this report, AT&T will get a 900. Looks like I might get the chance to play with one.

http://goo.gl/tP4I2

Looks like you were right:

• GSM 850
• GSM 900
• GSM 1800
• GSM 1900
• WCDMA Band V 850
• LTE Band 17 (700)
• WCDMA Band I 2100
• WCDMA Band II 1900
• WCDMA Band VIII 900
• LTE Band 4 (1700/2100)

http://www.nokia.com/us-en/products/...pecifications/