Neville Ray's central justification for the merger is that in 5G  "mid-band spectrum will achieve a 52 percent improvement" over 4G. That is not an appropriate figure today.

One reason for the improvement was that 5G allows 100 MHz bands compared to the 20 MHz bands of 4G. Sprint and China Mobile both have blocks of over 100 MHz at 2.6 GHz. The new 4G SuperBAND from Huawei effectively coordinates 100 Mhz of spectrum for a similar result. T-Mobile's vendors, Nokia and Ericsson, should soon be able to do similar.

Ray in a footnote points out he doesn't know whether his claim is accurate. "The spectral efficiency improvements are derived from equipment vendor simulations, internal T-Mobile analysis, and ITU requirements." Those equipment vendors are trying to sell him 5G equipment and have the incentive to make inflated claims. They are not a reliable source. It's easy to imagine testing that produces a preferred result.

There was no test data available when Ray (a first-rate engineer) wrote in June 2018. Fortunately, several vendors can now provide the equipment to provide more accurate figures. I have data from T-Mobile's parent company, Deutsche Telekom, that 5G speeds in 100 MHz of mid-band spectrum are 350-850 megabits. That's slower than the 4G starting to be deployed. 

SuperBAND 4G performance undermines the primary engineering argument for the deal. The early results from 5G suggest the actual testing of 5G will show less benefit than the T-Mobile claim. 

T-Mobile in Manhattan independently tests at 500 megabits down using LTE LAA. This is much faster than Ray's expectation for 5G because of the use of unlicensed spectrum through LAA. That's rapidly deploying across the country.

The FCC should suspend analyzing the deal until T-Mobile supplies current data. I'd expect the actual improvement in sub-6 GHz  is less than the annual 40% improvement Verizon reports for the last several years.

p.s. The filing makes claims about the capabilities of the Sprint network that are no longer true. Sprint cut capex in 2017 to under US$3 billion, leaving them far behind. They are raising capex to US$5-6 billion in 2018 and 2019. The performance already has dramatically improved.

Ray's analysis does not include the use of the 3.5 GHz shared CBRS spectrum, which is going live in the next few months. T-Mobile has demonstrated good results in CBRS. Commissioner Mike O'Reilly is confident hundreds of MHz in 3-7-4.2 GHz will also become available. I believe that spectrum could achieve most of the performance benefits of the merger.   

dave ask

Newsfeed

CFO John Stephens says AT&T is going to cut capex soon.

Bharti in India has lost 45M customers who did not want to pay the minimum US#2/month. It's shutting down 3G to free some spectrum for 4G. It is cutting capex, dangerous when the 12 gigabytes/month of use continues to rise.

Huawei in 6 days sold 300,000 5G Mate 20s. Delivery begins on 8/16. 

China has over 50,000 upgraded base stations and may have more than 200,000 by yearend 2019. The growth is astonishing and about to accelerate. China will have more 5G than North America and Europe combined for several years.

5G phone prices are down to $580 in China from Oppo. Headed under $300 in 2020 and driving demand.

No one believed me when I wrote in May, 90% of Huawei U.S. purchases can be rapidly replaced and that Huawei would survive and thrive. Financial results are in, with 23% growth and increased phone sales. It is spending $17B on research in 2019, up > 10%. 

5G phones spotted from Sharp and Sony

NTT DOCOMO will begin "pre-commercial service Sept 20 with over 100 live bases. Officially, the commercial start is 2020.

 More newsfeed

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Welcome  1,800,000 Koreans bought 5G in the first four months. The demand is there, and most of the technology works. Meanwhile, the hype is unreal. Time for reporting closer to the truth.

The estimates you hear about 5G costs are wildly exaggerated. Verizon is building the most advanced wireless network while reducing capex. Deutsche Telekom and Orange/France Telecom also confirm they won't raise capex.

Massive MIMO in either 4G or "5G" can increase capacity 3X to 7X, including putting 2.3 GHz to 4.2 GHz to use. Carrier Aggregation, 256 QAM, and other tools double and triple that. Verizon sees cost/bit dropping 40% per year.

Cisco & others see traffic growth slowing to 30%/year or less.  I infer overcapacity almost everywhere.  

Believe it or not, 80+% of 5G (mid-band) for several years will be slower than good 4G, which is more developed.