Bit of a noob question...
I'm interested in this phone, but will it work with any 3G providers in the US? It seems to only have WCDMA 2100 which means it wouldn't, but the GSM spectrum is fine. Am I missing something? It seems silly for a company to exclude a major audience like America by not putting in a 3G antenna that works here (too common a practice in Chinese phones it seems from looking around a little).
I would be very cautious of buying this phone for use in the US. I took my old Huawei U8220 (Pulse) to the US last year and got an AT&T SIM card for it. According to the phone specs and to AT&T themselves, it should have worked. But it would not connect to 3G no matter what we did. I eventually just bought a simple pre-paid phone to get me through, and used my Android phone as a PDA. No point paying the high AT&T rate for service I couldn't use.
You've got to understand that some of these Chinese companies are not targeting the US market in any way. They have a billion+ person market in their own country, and if they can get a good percentage of that market, they will be selling more phones than Apple sells iPhones. So instead little internet companies like the ones on Aliexpress or Etotalk deal with the International market. At least for now.....
If you want a Chinese phone but decent international support, consider Huawei or Lenovo or some other company that is already targeting the international market. And make sure the phone is made for sale in the US. At the moment, Jiayu is definitely not set up to deal with the US market. They don't even have anyone in customer service who can talk to you in English.
Just my $0.02 worth.