1 N2G47H eng.root.20200318.092710 1. Add the use of WIFI simulation NFC function, the manual book near the RTK host automatically connected. 2. Open the writing permission of external USB flash disk to solve the problem that surPAD software data cannot be exported to OTG USB flash disk. 3. Solve the problem that apK cannot be sent by Bluetooth 4. Solved the problem that the hot spot cannot be opened after inserting THE SIM card. 更改、优化如下系统功能： 1.增加使用WIFI模拟NFC功能，手簿靠近RTK主机自动连接。 2.开放外置U盘写入权限，解决surpad软件数据不能导出到otg U盘的问题。 3.解决不能使用蓝牙发送apk的问题 4.解决了插入SIM卡后不能打开热点的问题。 http://cors.geoelectron.com:2032/Handset/update3-7-0318.zip 284413801 8547B1C6199BADB56C8B93A898FFD1F5