This is the sneaky moment the opportunistic thief snatched a shop assistant's iPhone XR as they talked with a customer. <br /> <br />Nonthanan Khanthamthip, 23, put his own brand new smartphone on the counter while showing handsets to a male shopper at the department store in Bangkok, Thailand.<br /> <br />CCTV footage from last Thursday (March 7) shows how the thief wearing a grey t-shirt was walking towards the booth when he noticed the expensive iPhone XR on the display counter.<br /> <br />The thief, who pretended to be browsing, quickly grabbed the iPhone and after a few furtive glances, walked away inconspicuously while the stall owner was still busy talking.<br /> <br />Nonthanan tried to run after the burglar and told the mall security guards about the incident after realised his phone was stolen, but the thief already slipped away.<br /> <br />The iPhone owner then reported the police officers and showed the footage of the occurrence, wishing the guy to be arrested.<br /> <br />Speaking in the video, Khanthamthip said: ‘’I was showing one phone to the customer while I was holding my own and it was getting difficult, so I placed my phone on the glass. That’s when the guy appeared, but I didn’t see him.<br /> <br />‘’It was very busy because I had to take care of the stall on my own because the rest of the staff were on a break.’’