Conan Kudo

I think that more are getting converted than was previously thought. I remember a thread where someone wasn't getting CDMA coverage last year, but there was a Nextel tower nearby. The tower itself wasn't listed to be converted and then a year later, the same person mentioned that they got CDMA service because it had been unexpectedly converted to NV.

That guy wrote a letter to Dan Hesse convincing him to do it. It's fairly unusual, but heartfelt stuff like that can work.

For the 5S/5C, the only SKU that is truly different is the Sprint version of the 5S/5C. Sprint has the Asia/Pacific model while the other US carriers got the NAM version which has the other US relevant LTE bands (2,4,5,13,17).

The "Americas" model (yes, it's intended for North, Central, and South America) supports Band 25. It only lacks Band 26.

this was a discussion of Sprint phones and not VZW phones.so no BS in that.

The iPhone 5 is the same model for both VZW and Sprint, so it is relevant. 

swapping sims would only work with device that support the new CSIM.. as of now only iphone 5s and 5c.. old iphone 5 cannot use this sim or other current LTE devices

I say BS to that. The iPhone 5 does support the CSIM program, since that's how Verizon authenticates CDMA on its LTE devices (including the iPhone 5). Whether or not Sprint's CSIM program is authorized to work on an iPhone 5 is another matter, though.

I don't think the 896-928 MHz band has been FCC approved for wideband operations.

Well, Sprint doesn't own the licenses between Cellular and ISM. Those are owned by Aircell (who does business as Gogo), used specifically for ATG operations.

As for ISM, the main issue isn't "wideband", but tolerance. The network technology must be very resilient against interference in order to be classified as an ISM-usable technology. That spectrum is shared with licensed and unlicensed users, and all must accept interference and adjust accordingly.

What's more disappointing is that Sprint may not be able to use it anyway. The U.S.-Mexico shared block is the only part of that band that their current RRHs support. The U.S. block at 806-812.25 / 851-857.25 MHz will not be usable for Sprint's network. Unless that block is intended for federally owned systems?

Let's go with the "other" category. [M]SSTDMA

-Will

How well does that work? I've heard quite a few stories and read a few journal papers about the tech, but I'd rather hear about some empirical results...

I have been using 900 for testing with no I'll effects on 10 & 20 MHz TDD setups. I dont care what it is classified as, it works for high speed mobile broadband.

-Will

Well, if there're no ill effects, then my next question is, how are you providing wireless broadband service over it? Are you using LTE, WiMAX, or something else?

.

 

Yes ISN and I'm talking specifically about 3.6 since that's what I have a licence for.

-Will

Well, there's no LTE band for ISM 900. And of course, only LTE TDD could run on it. No one particularly wants to define an ISM 900 band for LTE, given how complex it is to use for such a network...

There's a band that covers 3.6-3.8GHz, which is Band 43.

Yes I want coverage everywhere. Otherwise I'm going to get my @$$ chewed for pleading Sprint.

Let's just make it Quinband (800/900/1900/2600/3600) plus you don't need that much money or time, read the sensorly directions, map where you go...that includes your home, neighborhood, work, school etc.

-Will

Septi-band (850/900/AWS/1900/2600/3500) or bust! 

Are you talking about ISM 900 (902-928 MHz) or EGSM band (880-915 / 925-960 MHz)? And when you say "3600", you're referring to 3.4-3.6 GHz band or the 3.6-3.8 GHz band?

Any chance that the note 10.1 2014 edition will come to sprint. I noticed the LTE bands it supported included 800, 1900, and 2600. 

This is why common frequency numbers cause way too much confusion...

The Note 10.1 2014 edition (LTE version) supports the following:

• GSM 850/900/1800/1900
• UMTS HSPA+42 850/900/1900/2100 (Bands V, VIII, II, I)
• LTE 800/850/900/1800/2100/2600 (Bands 20, 5, 8, 3, 1, 7)

Unless you specifically see a device say it supports Bands 25, 26, and 41, it won't work with Sprint. And even then, Sprint won't let you use your own device anyway. So it is pointless unless a Sprint-branded model arrives.

Is a CSE degree a computer science degree, or are you referring to Control Systems Engineer? I'm enrolled as an ITT management major but wondering if I should transfer over to UNF and start my electrical engineering degree so I can work in the wireless industry.  I'd love a job messing with cell phones and/or frequencies. 

 

Also - what is an RF cert?  Should I be contacting - let's say - Ericsson regarding this?  

CSE == Computer Science and Engineering. CSE covers software engineering, computer engineering, computer science, computer (IP/TDM) networks, etc.

Renumbering seems like it would be a huge mess, not for the people trying to figure out what bands their phones support.

The renumbering would likely only affect LTE TDD bands, as they would probably get pushed down to the 60s.

What is the 3GPP going to do after band 31 and 32? They're be out of FDD bands unless they start again at 50 or something.

There are a few reserved band numbers in place already, such as 15 and 16. However, devices don't strictly use band numbers. They rely on {U,E}ARFCNs, which band numbers are merely a construct of {U,E}ARFCN groups for frequencies. Renumbering is certainly possible, and increasingly likely, too.

Once sprint deploys the H block does that mean their existing 5x5 on 1900 goes to 10x10 on 1900 and will that double the data speeds?

With the current gear, that is not possible. The only way for Sprint to go to 10 MHz FDD with G+H is to upgrade the radio hardware (or get brand new radio hardware) to support the "multiple frequency band indicator" (otherwise known as MFBI) feature that allows Sprint to declare 5 MHz FDD for Band 25 and 10 MHz FDD for a newly defined extended PCS A-H band.

Existing devices with Band 25 will only see 5 MHz FDD until the end of their days. Devices with the new band will support 10 MHz FDD with G+H.

I've been wondering lately: what are the qualifications for the different jobs in the mobile/cellular industry?

 

I don't necessarily mean the actual climbing of towers and bolting on panels, but aspects like network planning, how and where cells need to be placed, evaluating what technologies are best for a network, evaluating performance, setting up FITs, things like that?

 

Thanks!

 

Tommy

 

Sent from my SPH-L710 using Tapatalk 4

Typically, an Electrical Engineering degree with a specialization in RF is involved, but any CSE degree will work, provided you've got certification and other credentials for RF and network planning. There are many specialty courses that teach those things (some of them provided by network infrastructure vendors), and it is a matter of proving that you've got the skill to take on the job. Some universities actually have RF engineering sub-majors for a Bachelor's degree, but the vast majority do not. Most people I know do specialization in RF as a Master's concentration instead.

I had forgotten that FCC mandate actually made it through in the past few years.  But has it passed a court challenge yet?  If not, VZW and AT&T will be licking their chops to try to get it struck down.

 

AJ

I believe the mandate in question was upheld last December.

Yep. It was upheld by the courts, so it is valid. It went into full effect in January.

What frequency are they going to be operating LTE on? Certainly not 800; my understanding is that they're leaving iDEN up and running forever.

It is the ESMR band. That's why construction won't begin for two years. The plan is to get people onto iDEN/GSM/UMTS or GSM/UMTS phones using the T-Mobile network as quickly as possible. Then they can gradually deploy the gear to iDEN sites and then shutdown iDEN and replace it with LTE on a market-by-market basis.

The plan is to move to GSM/UMTS/LTE handsets that will support the ESMR band for LTE. This ecosystem is going to be driven by Nextel in Latin America, principally.

Why?  They are not required to sign LTE data roaming agreements.  VZW and AT&T can just pull up the ladder and try to starve out the other operators.

 

AJ

Actually, yes they are. The FCC's data roaming mandate requires them to do so on fair terms for all parties involved. Admittedly, what is "fair" isn't well defined, but it is clear that LTE is included in that mandate.

Come on, Neal.  It is a "political decision."  You even agreed as such in a chat message that you sent me.  Now, you are just arguing semantics.

 

AJ

Yes, I did. It is political. I forgot to delete the word "neither" before posting. 

It could be a political decision, retribution for VZW.  Or it could be a technical reason, since band class 13 is the only one of the bunch that has an inverted FDD downlink/uplink.

 

AJ

Neither. VZW likely wouldn't agree to terms permitting the sale of the handset on the Play Store. 2013 Nexus 7 is a firm rebuttal to any technical issues with Bands 13+12/17 in the same device.

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