One day, a customer named Wang came to Jing's shop with a broken Nokia 3310. The phone had been dropped in water and had stopped working. Jing fixed the phone's water damage, but when he tried to activate it on Wang's network, the phone wouldn't register. The IMEI was corrupted.

For those who don't know, IMEI (International Mobile Equipment Identity) is a unique identifier assigned to each mobile phone. It's like a fingerprint that distinguishes one phone from another. However, some Chinese keypad mobiles had a tendency to have their IMEIs corrupted or lost, rendering them unusable on certain networks.

But Jing's success didn't go unnoticed. A rival repair shop owner, named Tony, tried to steal Jing's tool and replicate it. Tony offered Jing a large sum of money to buy the IMEI Rescue Master, but Jing refused.

Years later, when the smartphone had become the norm, and Chinese keypad mobiles were a thing of the past, Jing's IMEI Rescue Master tool was still remembered as a legendary fix-it solution. And Jing's shop remained a beloved institution in Shenzhen, a testament to the ingenuity and resourcefulness of a small but dedicated technician.