rk3399 android7.1.2, 4G网络不断断开重连

jewes

logcat中的部分日志如下：

04-16 14:05:18.545   635   635 D PhoneApp: Radio technology switched. Now GSM (0) is active.
04-16 14:05:18.545   635   635 D CallNotifier: mSignalInfoToneGenerator created already, hence skipping
04-16 14:05:18.545   635   635 D NetworkSettings: onReceive:
04-16 14:05:18.545   635   635 D NetworkSettings: updateBody: isLteOnCdma=false phoneSubId=1
04-16 14:05:18.547   635   635 D GsmUmtsOptions: Not a CDMA phone
04-16 14:05:18.548   635   635 D NetworkSettings: isWorldMode=false
04-16 14:05:18.548   635   635 D NetworkSettings: settingsNetworkMode: 9
04-16 14:05:18.548   635   635 D NetworkSettings: UpdatePreferredNetworkModeSummary networkmode:9
04-16 14:05:18.548   635   635 D NetworkSettings: UpdateEnabledNetworksValueAndSummary NetworkMode:9
04-16 14:05:18.548   635   635 D NetworkSettings: isWorldMode=false
04-16 14:05:18.572   635   635 I Telephony: PstnIncomingCallNotifier: Unregistering: Handler (com.android.internal.telephony.GsmCdmaPhone) {fb2d148}
04-16 14:05:18.585   538   549 W Telecom : : registerPhoneAccount not allowed on non-voice capable device.: TSI.rPA@FnA
04-16 14:05:18.586   635   635 I Telephony: AccountEntry: Registered phoneAccount: [[ ] PhoneAccount: ComponentInfo{com.android.phone/com.android.services.telephony.TelephonyConnectionService}, [76cdfd358508bec0a3a66952503b730bc703d9e1], UserHandle{0} Capabilities: CallProvider MultiUser PlaceEmerg SimSub  Audio Routes: BESW Schemes: tel voicemail  Extras: null GroupId: [da39a3ee5e6b4b0d3255bfef95601890afd80709]] with handle: ComponentInfo{com.android.phone/com.android.services.telephony.TelephonyConnectionService}, [76cdfd358508bec0a3a66952503b730bc703d9e1], UserHandle{0}
04-16 14:05:18.586   635   635 I Telephony: PstnIncomingCallNotifier: Registering: Handler (com.android.internal.telephony.GsmCdmaPhone) {fb2d148}