[husam2277]

Any exact info about the specs and differences between lumia 1520 RM-937, RM-938 and RM-940? Many says that RM-937 is the global version. Which one is at&t? Please provide official sources if available. Thanks all :)

[husam2277]

What i know and not sure about is as follow:

1- RM-937, Global version, LTE 800 / 900 / 1800 / 2100 / 2600, 32GB, built in wireless charging.

2- RM-938, US version, LTE 700 / 850 / 1700 / 1900 / 2100 / 2600, 32GB, built in wireless charging.

3- RM-939, China version, WCDMA HSPA+ version, No LTE.

4- RM-940, at&t version, LTE 700 / 850 / 1700 / 1900 / 2100, 16GB, No wireless charging built in.

Any approval for the above?

[T Moore]

Difference between RM-938 and RM-940 is that DTM feature and WCDM1700/2100 (Band 4) will be disabled from RM-940,
So the RM-940 will only have LTE 2 5 17. Band 4 is T-Mobile.
#Lumia1520 variant RM-940 for AT&T passes through FCC. Size revealed. Global Variant RM-938 to have inbuilt wireless charging.

[ATATKDDad]

Can band 4 be "enabled" via any hack or set of Phone keypad entries (similar to Android) to select the band or bands that have been disabled? any hack on XDA? I will pith-in some $$$!

[kevm14]

Wait, I don't think that's right. I think the RM-940 supports LTE on band 4 (AT&T has LTE on band 4). Band 4 is really AWS. The problem is, AT&T doesn't use HSPA on AWS, while T-Mobile does. So the RM-940 wouldn't have HSPA on T-Mobile, only LTE or EDGE. UNLESS you are in a so-called "refarmed" area where T-Mobile is moving HSPA from AWS to PCS (1.9GHz), then the RM-940 would support HSPA on T-Mobile. And by the way, no US carrier uses 2.6GHz (which the RM-938 supports). I think it's why people refer to it as the south/central American 1520. Someone correct me if I am wrong...

[manicottiK]

1- RM-937, Global version, LTE 800 / 900 / 1800 / 2100 / 2600, 32GB, built in wireless charging.
2- RM-938, US version, LTE 700 / 850 / 1700 / 1900 / 2100 / 2600, 32GB, built in wireless charging.

With LTE, it's probably better to think in "bands" rather than exclusively in frequencies because there are so many bands splitting so much radio spectrum. A key point is that the "2100" in the RM-937 and RM-938/940 are different because the 937/938 use BOTH 1700 and 2100 to provide LTE band 4. The 938/940 don't do LTE on 1700 and LTE on 2100; they do LTE on band 4, which uses one frequency range for uploading and the other for downloading.

[kevm14]

You just described AWS. Advanced Wireless Services - Wikipedia, the free encyclopedia

The AWS band uses microwave frequencies in two segments: from 1710 to 1755 MHz for uplink, and from 2110 to 2155 MHz for downlink

Both the RM-938 and RM-940 support AWS frequencies/bands. It's just that RM-940 doesn't support HSPA on AWS, while the RM-938 does. At least that is what I currently believe to be true.

[Nicolas Walter Fulco]

I am not very skilled in technology nor in english, can I just ask which one of this models could I use in Argentina? being that we use band 4 for LTE and band 28 (700 MHz) in the rural areas. Could someone recommend me one? please, and thank you.

[RumoredNow]

I am not very skilled in technology nor in english, can I just ask which one of this models could I use in Argentina? being that we use band 4 for LTE and band 28 (700 MHz) in the rural areas. Could someone recommend me one? please, and thank you.

Hello Nicholas and welcome to Windows Central.

In Argentina you want RM-938 or 1520.3 as it is sometimes called. Some sites say it is US version, but really the ATT model (RM-940) is US exclusive.

Get the RM-938. It was made for Latin American markets. You can get a Factory Unlocked 1520.3 RM-938 that will take any SIM card. Also there is a MoviStar Argentina branded variant. If you get one made for MoviStar and that is not your carrier, make sure the SIM tray is unlocked before buying.

[UptownWebhead]

I am not very skilled in technology nor in english, can I just ask which one of this models could I use in Argentina? being that we use band 4 for LTE and band 28 (700 MHz) in the rural areas. Could someone recommend me one? please, and thank you.

Saludos, Nicolás. Como te están diciendo, vas a tener que comprar la versión 1520.3 o RM-938.

Posted via the Windows Central App for Android

[coolbreeze78]

1520.3's are going for like $700. Insanity.

[RumoredNow]

I got mine for $485 USD brand new. Now that they are out of production I guess it is a seller's market.

[UptownWebhead]

I got mine for $485 USD brand new. Now that they are out of production I guess it is a seller's market.

Seriously. Luckily I picked up two before they all went away. One white, one black. Got em from B&H for around the same price. Might consider selling one.

Posted via the Windows Central App for Android

[Nicolas Walter Fulco]

I think I am about the buy a RM-940, for what I've been searching that phone would also work for LTE in Argentina, can someone confirm this or denied it? please, i appreciatte every oppinion or fact about it (better if it is a fact) jaja
Besides, what does it mean there is a Movistar branded version? i have Movistar in Argentina so any info is welcome.

[RumoredNow]

Yes... The ATT RM-940 will work in Argentina so long as the SIM tray is unlocked from ATT.

This table Availability in Latin America - Microsoft - Global shows that in Argentina 1520 comes in 2 variants. A Country Variant (Factory Unlocked) and a variant specifically marketed through MoviStar. I believe both of those are RM-938

I don;t know if the carriers get the SIM tray locked to their service in Argentina. I imagine they must, or why would there be a MoviStar edition?

[omar-zambrano]

Can I flash a rm940 to an rm 938 ir rm 937

[RumoredNow]

Can I flash a rm940 to an rm 938 ir rm 937

No. AT&T firmware has locked out flashing to another variant. Sorry.

[omar-zambrano]

Damm. Then someone knows how to get full control over the apn settings and force 3g not limiting the GSM bands

[RumoredNow]

Damm. Then someone knows how to get full control over the apn settings and force 3g not limiting the GSM bands

You want Field Test Menu for that.

http://forums.windowscentral.com/nok...ml#post2511213

[omar-zambrano]

Can't force 3g networks, I just can mess around with the bands allowed to work.

[RumoredNow]

Sorry, dude. I don't have a phone that allows Field Test, ATM. The link I dropped above should be the way.

Try ##3282# from the dialer > settings > network type > 3G only

This is field test mode and it works on my AT&T 1520.

[Tullphan]

Would the RM-937 be a bad choice for the US market?

[RumoredNow]

RM-937

Zero LTE. Not just the wrong LTE for the US, but no LTE period.

AT&T or AT&T mvno and it is fine. It is missing the 1700 MHz band on 3G to get T-Mo H+ in all areas...

Other than that; it's still the BeastPhone^TM.

[scionluna]

Is the RM-937 known as Lumia 1520.1?

Edit: My research is showing that the RM-937 is the 1520.1. I would like someone to confirm please.
@RumoredNow, Are the US LTE bands physically excluded from the RM-937 or deactivated via software?

[RumoredNow]

@RumoredNow, Are the US LTE bands physically excluded from the RM-937 or deactivated via software?

I'm afraid I don't have that answer...

Someone with an RM-937 would be able to answer that if they can access Field Test Menu.

I'll ask someone who knows cross flashing ROMs to look at your question.