I agree with you that customer service and retention is very important, without that it will be very hard to survive in the market of US. But,according to the site of Huawei there are remote office spread all over US.
Model: Huawei Mate 9
Purchased: Jan 2017
Model: MHA-L29
CPU: Octa-core 2.4 GHz
RAM: 4 GB
Android: 7.0 / Nougat
Summary:
Having tired of the Apple & Samsung duopoly, I wanted to find an alternative. I sought out HTC, Google, and Hauwei phones... and finally settled on the Huawei Mate 9, buying one myself and another for girlfriend. We've had the phones for only 2-3 months, but the love affair has been short lived.
Two issues:
1) The volume button on both phones continue to work, but no longer have the 'click' snesation when pushed, now it needs to be mashed a bit to get any response
2) My screen shattered with a 30 inch drop from a sink, onto a tile floor.
My issue here is not my clumsyness, but that Huawei has no service cetnres in the US... ZERO! It's just not possible to get a broken phone repaired by an authorized technician. Additionally, neither myself nor Huawei USA are able to locate private/third-party repair shops qualified to do the work, even in a major city like NYC.
The best Huawei could offer was that I should 'look for parts on the internet' and see if I could find instructional videos on YouTube.
This is a strong word of caution to prospective buyers - stay away from the device until they get thier service optoins sorted.
Also, a word of advice to Huawei - if you want to penetrate the US market you need an actual presence here. This half-hearted approach will not work.

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