1. AC Question's Avatar
    I was thinking maybe a device can be insert on phone jack and recieve 4g signals that will help 3g smartphones to be fast.
    09-13-2015 08:02 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! I found this video, which shows someone using a USB OTG cable connected to a 3G dongle, so presumably you could connect a 4G LTE dongle instead. It doesn't work on Android 4.3 or above, but there aren't that many 3G-only phones that would be updated that high anyway.

    09-13-2015 11:38 PM

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