Does JiaYu Support 850/1900MHz? (AKA Difference Between Engineering Mode and Reality)

rf-header3_1Often I see it posted in blogs and forums something to the effect of ‘engineering mode says it has 850MHz, so it must be true’. Though no matter how much we wish it, it’s simply not. MTK6589 and it’s aging brothers MTK6577/MTK6575 etc…, all have chipset support for many GSM/WCDMA frequencies.

If you go into engineering mode through Mobile Uncle app or by dialing the code you will see them. This is only what the chipset supports – the phone will not be capable of using these frequencies, unless it contains a radio tuned to to the desired band.

To answer the question of the title. The answer is a solid NO. None of the current JiaYu phones (G2,G3,G4 Normal) have support for any WCDMA frequency other than 2100MHz.

Gizbeat hates to be the bearer of bad news. It would be great if the top budget brands supported 850 and 1900, but it’s currently not the case. As to the reasons behind it, we can only guess. It could be a deal made with the carriers in China. Though it’s certainly not an issue not being able to get licensing as THL, Zopo and Star all have 850.

I wrote an article a couple months back about Qualcomm coming out with the RF360 which supports a whopping 40 bands! It’s generated surprisingly little comment or excitement here at Gizbeat and on Chinaphonearena, but this is one of the most exciting things to happen to phones in a long time and hopefully MTK follows suit with something equally ‘worldly’.

Comments

11 responses to “Does JiaYu Support 850/1900MHz? (AKA Difference Between Engineering Mode and Reality)”

  1. Bert Avatar
    Bert

    Damian, thanks for the article. Just to confirm, are you saying that the chipset in the JiaYu phones are missing a physical radio which would allow the other frequencies? If so, why do other phones with the same chipset (e.g. ZTE V987) support 900MHz WCDMA as well as 2100MHz?

    1. Damian Parsons Avatar
      Damian Parsons

      If a phone supports 900MHz WCDMA, it’s because they’ve included a radio tuned to 900MHz.

  2. Ozi Avatar
    Ozi

    Hi Damian , which are quad core dual sim phones which support 900/2100 3G ?

  3. roberto Avatar
    roberto

    I have a jiayu g3s in mexico city and the 3g works like a charm!

    1. Damian Parsons Avatar
      Damian Parsons

      Please send a screen shot or video of you getting HSDPA / UMTS signal. I’m very interested to see this. According to Jiayu’s old official site and respected shops, the phone only has 2100 for WCDMA.

      1. Walter Fernandez Avatar
        Walter Fernandez

        I have a Jiayu G4T (Basic) and it supports 3G (Displays an H+, on top right) here in Peru, we use WCDMA 850.

        1. Maximiliano Avatar
          Maximiliano

          its hard to believe, please, Walter, post one screenshot of your phone, or better, post a youtube video with you and your phone getting 3g (H+) in Peru.

      2. roberto Avatar
        roberto

        Yes all specs about jiayu 3gs (and all Jiayu models) say the phone has only wdcma 2100, in Mexico city nobody knows if a 2100 is covered by TELCEL I have a dooge dg550 with 850/2100 that works fine because the 850 band that is covered by TELCEL. but the jiauyu works as well!!! the only differece is that the signal color is orange,,,but shows H+ and i can surf internet of course with the wifi turned off… I will post a jiayu video getting 3g H+ in mexico city soon regards.

        1. Maximiliano Avatar
          Maximiliano

          Nice to read that, when you have the video please post a link.

          Que bueno leer eso, cuando tengas el video copiame el link.

          Thanks
          Gracias!

  4. Roberto Avatar
    Roberto

    Here it is!!!! finally the video (Sorry for the quality I was in a hurry), but shows getting 3g H+ in mexico city surfing google earth. Of course with the wifi turned off…
    regards! check the link!
    https://www.youtube.com/watch?v=YezkshjFSrs&feature=youtu.be

    Is a very good phone but OTG is not available in this phones.

    1. Maximiliano Avatar
      Maximiliano

      Thanks for the Video Roberto, one more question, if you remove the battery, the phone have printed the “WCDMA: 2100” or says 850/2100 ?
      Regards!

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