There are many mobile apps to create fake SMS and calls (That simulate real message/call as if a real message arrived via network). You can read about these in the post "Create and send fake sms to your own mobile free". Once a SMS is created via these apps (In inbox/Sent folder) you just can’t differentiate whether it is a fake or a real one. However I have found a simple way to detect such SMS/Calls in Symbian S60 phones. (Not sure whether it will work in other mobiles like iPhone, Blackberry, Android etc). Here goes the detection method:
1. Go to “Messages” in phone
2. In Messages navigate to the message you suspect as fake, highlight that message and go to “Options/Message details”. Note down the date and time of message.
3. Now go to “Log” (Call log app in menu)
4. Press Navigation key to “Right” (To access all calls/data/message detail log)
5. Press navigation key down until you reach the date and time noted in Step 2 above
6. If an entry of that SMS/Call is present at that time then you can be sure it was a genuine SMS/Call arriving via network. If however the entry is not present in log then it was definitely a fake message/call.
The logic behind this trick is simple: A fake SMS/Call does not leave an entry in “Log”. Symbian phone’s inbuilt “Log” app records all the network activity (Incoming/Outgoing calls/SMS/Data along with numbers and duration). As the fake SMS/Call is a network independent activity, it is (Fortunately) not recorded by log. So it is a challenge for developers of such apps to rectify this in upcoming versions.
Note: To utilize the “Log” in the above method, the log duration must be set to 10 or 30 days (Go to Log/Options/Settings/Log duration). If you know any other method to detect fake SMS/Call please share it here.
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