3 ms·

Thanks for pointing out band 40. Apparently it's just used in China, but it is supported on the iPhone 13. Band 30 is a no-go because the downlink is at 2350 t

• RF_Savage 5y ago
  The 13cm band is a bit of a mess globally. Here in Finland it's still full 2300-2450MHz. But in 2300-2320MHz it is shared with lightly licenced "provate LTE". Hop over to Sweden and it's 2400-2450MHz only with a powerlimit under a watt. And im USA it's that pumctured mess, isn't there also AT&T running Band30 FDD-LTE? Years back when I was searching for LTE phones with Band30 for hamLTE use I only found AT&T carrier locked stuff from USA.
• namibj 5y ago
  Band38 is the one most 2.4 GHz WiFi-covering half-duplex SDR can handle, at least if modified/adjusted with a local oscillator quartz suitable for LTE. It's an ugly fraction to synthesize with a fractional PLL to LTE-specs of local-oscillator-quality. Yeah, it's not ham, but low power levels and RF-shielding-cages should suffice to keep radiated emissions far below interfering levels. It's also surprisingly well supported, at least on non-US handsets, from when I researched it a bit a few months before the first wave hit and blocked collaborative hardware hacking.