diff --git a/Telegram/SourceFiles/messenger.cpp b/Telegram/SourceFiles/messenger.cpp
index e8307a0b0..a954e8f34 100644
--- a/Telegram/SourceFiles/messenger.cpp
+++ b/Telegram/SourceFiles/messenger.cpp
@@ -387,6 +387,9 @@ void Messenger::setAuthSessionFromStorage(
 		int32 selfStreamVersion) {
 	Expects(!authSession());
 
+	DEBUG_LOG(("authSessionUserSerialized set: %1"
+		).arg(selfSerialized.size()));
+
 	_private->storedAuthSession = std::move(data);
 	_private->authSessionUserSerialized = std::move(selfSerialized);
 	_private->authSessionUserStreamVersion = selfStreamVersion;
@@ -467,6 +470,8 @@ void Messenger::startMtp() {
 	}
 
 	if (_private->authSessionUserId) {
+		DEBUG_LOG(("authSessionUserSerialized.size: %1"
+			).arg(_private->authSessionUserSerialized.size()));
 		QDataStream peekStream(_private->authSessionUserSerialized);
 		const auto phone = Serialize::peekUserPhone(
 			_private->authSessionUserStreamVersion,
diff --git a/Telegram/SourceFiles/storage/localstorage.cpp b/Telegram/SourceFiles/storage/localstorage.cpp
index f067fef93..e112f480a 100644
--- a/Telegram/SourceFiles/storage/localstorage.cpp
+++ b/Telegram/SourceFiles/storage/localstorage.cpp
@@ -2325,6 +2325,7 @@ ReadMapState _readMap(const QByteArray &pass) {
 	_readUserSettings();
 	_readMtpData();
 
+	DEBUG_LOG(("selfSerialized set: %1").arg(selfSerialized.size()));
 	Messenger::Instance().setAuthSessionFromStorage(
 		std::move(StoredAuthSessionCache),
 		std::move(selfSerialized),
@@ -2372,10 +2373,12 @@ void _writeMap(WriteMapWhen when) {
 	uint32 mapSize = 0;
 	const auto self = [] {
 		if (!AuthSession::Exists()) {
+			DEBUG_LOG(("AuthSelf Warning: Session does not exist."));
 			return QByteArray();
 		}
 		const auto self = Auth().user();
 		if (self->phone().isEmpty()) {
+			DEBUG_LOG(("AuthSelf Error: Phone is empty."));
 			return QByteArray();
 		}
 		auto result = QByteArray();
diff --git a/Telegram/SourceFiles/storage/serialize_common.cpp b/Telegram/SourceFiles/storage/serialize_common.cpp
index d7784132b..39f3711bf 100644
--- a/Telegram/SourceFiles/storage/serialize_common.cpp
+++ b/Telegram/SourceFiles/storage/serialize_common.cpp
@@ -264,6 +264,7 @@ PeerData *readPeer(int streamAppVersion, QDataStream &stream) {
 QString peekUserPhone(int streamAppVersion, QDataStream &stream) {
 	quint64 peerId = 0, photoId = 0;
 	stream >> peerId >> photoId;
+	DEBUG_LOG(("peekUserPhone.id: %1").arg(peerId));
 	if (!peerId || !peerIsUser(peerId)) {
 		return QString();
 	}
@@ -273,6 +274,8 @@ QString peekUserPhone(int streamAppVersion, QDataStream &stream) {
 		stream);
 	QString first, last, phone;
 	stream >> first >> last >> phone;
+	DEBUG_LOG(("peekUserPhone.data: %1 %2 %3"
+		).arg(first).arg(last).arg(phone));
 	return phone;
 }
 
diff --git a/Telegram/SourceFiles/support/support_common.cpp b/Telegram/SourceFiles/support/support_common.cpp
index f0c664d83..a137b0ce4 100644
--- a/Telegram/SourceFiles/support/support_common.cpp
+++ b/Telegram/SourceFiles/support/support_common.cpp
@@ -14,6 +14,9 @@ namespace Support {
 bool ValidateAccount(const MTPUser &self) {
 	//return true; AssertIsDebug();
 	return self.match([](const MTPDuser &data) {
+		DEBUG_LOG(("ValidateAccount: %1 %2"
+			).arg(Logs::b(data.has_phone())
+			).arg(data.has_phone() ? qs(data.vphone) : QString()));
 		return data.has_phone() && qs(data.vphone).startsWith(qstr("424"));
 	}, [](const MTPDuserEmpty &data) {
 		return false;