diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/jce/SvcReqRegister.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/jce/SvcReqRegister.kt
index 727155432..3bea4715f 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/jce/SvcReqRegister.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/jce/SvcReqRegister.kt
@@ -25,15 +25,15 @@ class SvcReqRegister(
     val lBid: Long = 0L,
     val lCpId: Long = 0L,
     val lUin: Long = 0L,
-    val sBuildVer: String? = "",
-    val sChannelNo: String? = "",
+    val sBuildVer: String? = null,
+    val sChannelNo: String? = null,
     val sOther: String = "",
-    val strDevName: String? = "",
-    val strDevType: String? = "",
-    val strIOSIdfa: String? = "",
-    val strOSVer: String? = "",
-    val strVendorName: String? = "",
-    val strVendorOSName: String? = "",
+    val strDevName: String? = null,
+    val strDevType: String? = null,
+    val strIOSIdfa: String? = null,
+    val strOSVer: String? = null,
+    val strVendorName: String? = null,
+    val strVendorOSName: String? = null,
     val timeStamp: Long = 0L,
     val uNewSSOIp: Long = 0L,
     val uOldSSOIp: Long = 0L,
diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
index c8e81b8f9..87b748041 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
@@ -10,6 +10,7 @@ import net.mamoe.mirai.qqandroid.network.protocol.packet.*
 import net.mamoe.mirai.qqandroid.utils.GuidSource
 import net.mamoe.mirai.qqandroid.utils.MacOrAndroidIdChangeFlag
 import net.mamoe.mirai.qqandroid.utils.guidFlag
+import net.mamoe.mirai.utils.MiraiDebugAPI
 import net.mamoe.mirai.utils.MiraiInternalAPI
 import net.mamoe.mirai.utils.cryptor.contentToString
 import net.mamoe.mirai.utils.cryptor.decryptBy
@@ -174,6 +175,7 @@ internal object LoginPacket : PacketFactory<LoginPacket.LoginPacketResponse>() {
         object Success : LoginPacketResponse()
     }
 
+    @UseExperimental(MiraiDebugAPI::class)
     override suspend fun ByteReadPacket.decode(bot: QQAndroidBot): LoginPacketResponse = this.debugPrint("login解析").run {
         // 00 09 sub cmd
         // 00 type
diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/utils/DeviceInfo.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/utils/DeviceInfo.kt
index 0094bea83..327a775a8 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/utils/DeviceInfo.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/utils/DeviceInfo.kt
@@ -3,10 +3,8 @@ package net.mamoe.mirai.qqandroid.utils
 import kotlinx.serialization.SerialId
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.protobuf.ProtoBuf
-import net.mamoe.mirai.qqandroid.network.protocol.packet.oidb.oidb0x769.Oidb0x769
 import net.mamoe.mirai.utils.cryptor.contentToString
 import net.mamoe.mirai.utils.getValue
-import net.mamoe.mirai.utils.io.encodeToString
 import net.mamoe.mirai.utils.unsafeWeakRef
 
 abstract class DeviceInfo(
@@ -42,7 +40,7 @@ abstract class DeviceInfo(
     abstract val imsiMd5: ByteArray
     abstract val imei: String
 
-    abstract val ipAddress: String
+    abstract val ipAddress: ByteArray
 
     abstract val androidId: ByteArray