This information was shared by Jon Prosser's Front Page Tech YouTube channel, which last year had several accurate data on Pixel 3 and Pixel 3 XL source a month ago they also confirmed the presence of Pixel 3a devices before the official release.
According to the Prosser source, Pixel 4 will use capacitive touchpad areas on the sides of the aluminum handset instead of the push-button physical power and volume buttons. Prosser offers these sensitive areas to use the advanced version of Google's existing Active Edge technology, which is currently found on Pixel 2 and Pixel 3, which allows users to squeeze their phone to launch or mute Google Assistant incoming calls and messages.
In addition, the Prosser source confirms other latest rumors, including the presence of exposed perforator cameras similar to those seen this year on Samsung Galaxy 1
It is expected that at the end of the device there is a new dual-lens camera setup, including a telephoto lens or a super wide angle sensor, and can be horizontally positioned in the upper left hand corner of the handset, rather than seeing a typical vertical orientation in other dual-lens smartphone.
Pixel 4 and Pixel 4 XL are expected to be 4G LTE devices, and they are likely to be released in the second week of October or only a few weeks after Apple is expected to showcase IPhone XS Successors iPhone XS Max and iPhone XR.
(Via PhoneArena.com )