An external antenna will improve your phone’s reception. While an external antenna may not be required, some new mobile phones have an antenna connector built into their body, like the Telstra Tough Max 3. An external antenna is made of a material that is more flexible than the internal antenna. Adafruit Industries, Unique & fun DIY electronics and kits GPS Antenna - External Active Antenna - 3-5V 28dB 5 Meter SMA : ID 960 - Give your Ultimate GPS V3 a boost with this external active antenna. This GPS antenna draws about 10mA and will give you an additional 28 dB of gain. It's got a 5 meter long cable so it will easily reach wherever
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Your iPhone includes a GPS chip like the one found in standalone GPS devices. The iPhone uses the GPS chip in conjunction with cellphone towers and Wi-Fi networks in a process called assisted GPS, which helps calculate the phone's position. You don't need to set up the GPS chip, but you can turn it off or limit its functions on the iPhone. Here
2018 PCMag RF Test. PCMag tested the iPhone XS, iPhone XS Max, iPhone XR, Samsung Galaxy Note 9, Google Pixel 3, LG V40, and OnePlus 6T in 2018. They found that the Samsung Galaxy offered better reception than iPhones. However, the overall best performer was the LG V40. All tested Apple phones used Intel modems, while all Androids used Qualcomm I’ve got a kenwood dnx997xr and i used the iDatalink. $29 ACC-SAT-TO2 Sat Radio and GPS Antenna adaptors for TO2 Vehicles. ACC-SAT-TO2 adapter. Wireless CarPlay just requires GPS (either factory or aftermarket) Originally used the supplied antenna with the unit until I found out about the adapter to use the factory one. The External GPS Receiver adds speed and location data to your videos. Speed: speed data–in Km/h or Mph–will be overlaid in the video (can be turned off in the dashcam’s settings). Location: you can visualize the location of your vehicle in the BlackVue Viewer’s Map during video playback.
I recommend the app Bluetooth GPS to connect to the external receiver. When it's connected the internal receiver won't be used. When you turn off the application the phone will automatically use the internal receiver when needed. This will save you some battery but the navigation app and Bluetooth will still draw a lot of juice.
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