John had bought the phone from a carrier store, and he suspected that it was locked to their network. He called the customer service number, but they told him that he needed to pay a hefty fee to get the unlock code. John was not willing to pay that much, so he started searching online for free solutions.
John dialed the code *#*#232338#*#* on his phone, which opened the device's information screen. He then looked for the "Network lock" or " SIM lock" option and enabled it. Next, he dialed another code: *#*#528372#*#* . This code prompted his phone to display a message saying "Sim network unlock pin."
It was a sunny Saturday morning when John woke up to find that his Samsung A01 Core phone had stopped working on his network. He had been using the same SIM card for months without any issues, but now his phone displayed a frustrating message: "Network Locked." He tried restarting his phone, but that didn't help.