手癢買了 Sharp 出給 Softbank 的 Sense5G 。先說結論,Softbank 使用的5G頻段是N77,台灣的電信業者支援的5G頻段是N78。這隻手機在台灣只有4G訊號。
台灣好像也會有的銅色
順便在亞馬遜買了手機殼還有螢幕保護貼
會說話的Emopa
截圖來自NCC的資訊,台日的5G頻率不一樣
https://cdn.softbank.jp/mobile/set/common/pdf/products/aquos-sense5g/spectrum.pdf
Softbank is refarming the B42 range into native N78,but nobody can check if it's accessible through single N77 band device,it looks like Both Qualcomm & Mediatek platform will support N78 & N77 at the same time,due to the N78 is a subset of N77 which can be supported by same RFFE,only extra software logic will needed for N78.It's obviously not a problem for internationl phones in Japan on N78 networks,but the roaming capability of Japan domestic phones like ones that customed by Softbank will have a big question,due to the Softbank like making roaming band limitation and cut off some none domestic band logic in modem software by hardcoded methods(In this scnerio,n78 support removed,only n77 left,but this is very hard to verify for major customers,which needed qualcomm internal toolkit)
The LTE has a infamous MFBI problem that not noticed by too many people,it actually causes big problem for roaming compatibility,due to the carriers always don't purchase the extra license for MFBI function for basestaion.It looks like the NRARFAN had went back to the UARFCN style that every freq has its unique channel number,instead of the LTE EARFCN that lineniar increased with band numbers,but this need to be proved by SIB1 in NR or something else