--- a/dom/system/gonk/RILContentHelper.js
+++ b/dom/system/gonk/RILContentHelper.js
@@ -879,17 +879,19 @@ RILContentHelper.prototype = {
         if (this.cardState != msg.json.cardState) {
           this.cardState = msg.json.cardState;
           Services.obs.notifyObservers(null, kCardStateChangedTopic, null);
         }
         break;
       case "RIL:IccInfoChanged":
         this.updateICCInfo(msg.json, this.iccInfo);
         if (this.iccInfo.mcc) {
-          Services.prefs.setIntPref("ril.lastKnownMcc", this.iccInfo.mcc);
+          try {
+            Services.prefs.setIntPref("ril.lastKnownMcc", this.iccInfo.mcc);
+          } catch (e) {}
         }
         Services.obs.notifyObservers(null, kIccInfoChangedTopic, null);
         break;
       case "RIL:VoiceInfoChanged":
         this.updateConnectionInfo(msg.json, this.voiceConnectionInfo);
         Services.obs.notifyObservers(null, kVoiceChangedTopic, null);
         break;
       case "RIL:DataInfoChanged":