In Krabi, Thailand I was checking in baggage and there was a sign saying that e.g. smartphones, laptops (but also handbags) are not allowed in checked baggage. I had to put my (broken) smartphone into my backpack that was my hand luggage.
What is the rationale behind it? Do they think that bombs are less dangerous in the cabin after all? This contradicts what I have learned so far.
The airline is Thai Lion and this is a domestic flight to Bangkok.