Faults with Phone's Firmwares: For Samsung Galaxy S6, S7, S9, Note 5 and JIO models, if the prompt of Network Locked SIM Card Inserted is after the device is updated or restored, the problem is likely caused by the mobile phone firmware failure.ģ. Network Lock: If you get the Samsung mobile phone from a network provider, it is likely that the device is still locked to their network.Ģ. Generally, the following reasons will cause your Samsung device to be locked when inserting a new SIM card.ġ. Part 3 Invalid SIM Card - What are the reasons for Network Locked SIM Card Inserted? Unless you enter an 8-bit or 16-bit unlock code to unlock the network, your device won't work with other SIM cards. If you receive one of the following alerts on your phone screen, your phone is locked in because your phone network is still locked to the original network carrier. Part 2 When Do I Need to enter SIM Network Unlock PIN? Some specific Samsung models require a define code along the unlock code. The PIN/Code to unlock Samsung's mobile phone was an 8-digit code before 2009, but since 2019, Samsung has used a 16-digit network code. The purpose is that devices can only use their network. The SIM network unlock PIN is a code provided by the network provider to unlock the SIM card network. Free Trial for Win Part 1 Introduction to SIM Network Unlock PIN/Code
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