diff --git a/shill/cellular/cellular.cc b/shill/cellular/cellular.cc
index 9899212..bfa291a 100644
--- a/shill/cellular/cellular.cc
+++ b/shill/cellular/cellular.cc
@@ -763,6 +763,7 @@
 }
 
 void Cellular::ReAttach() {
+  SLOG(this, 1) << __func__;
   if (!enabled() && !enabled_pending()) {
     LOG(WARNING) << __func__ << " Modem not enabled, skipped re-attach.";
     return;
diff --git a/shill/cellular/cellular_capability_3gpp.cc b/shill/cellular/cellular_capability_3gpp.cc
index c7993ea..5b9f641 100644
--- a/shill/cellular/cellular_capability_3gpp.cc
+++ b/shill/cellular/cellular_capability_3gpp.cc
@@ -1616,6 +1616,7 @@
 }
 
 void CellularCapability3gpp::OnProfilesChanged(const Profiles& profiles) {
+  SLOG(this, 3) << __func__;
   profiles_.clear();
   for (const auto& profile : profiles) {
     auto apn_info = std::make_unique<MobileOperatorInfo::MobileAPN>();
@@ -1748,6 +1749,7 @@
 }
 
 void CellularCapability3gpp::OnFacilityLocksChanged(uint32_t locks) {
+  SLOG(this, 3) << __func__ << ": locks = " << locks;
   bool sim_enabled = !!(locks & MM_MODEM_3GPP_FACILITY_SIM);
   if (sim_lock_status_.enabled != sim_enabled) {
     sim_lock_status_.enabled = sim_enabled;