Gadget Terminal was not the first shop at Sim Lim Square to break the law.

Former Mobile Air owner Jover Chew Chiew Loon was jailed 33 months in November last year for cheating 26 customers of over $16,000.

He also admitted to one count each of criminal intimidation and intentionally causing distress.

The month before, four of his former employees were sentenced to between four and 14 months' jail for cheating.

Kam Kok Keong, 31, Kelvin Lim Zhi Wei, 32, Lim Hong Ching, 34, and Koh Guan Seng, 38, had cheated unsuspecting customers of $16,149 between April 15 and Oct 27, 2014.

Mobile Air came under the spotlight when a Vietnamese tourist was caught on video kneeling in the shop and begging for a refund in November last year. Chew was not charged over this incident.

The month before, the shop was reported to have refunded $1,010 to a customer in coins.