Softbank Pocket WiFi 305ZT router is available in Japan which is ZTE make. Factory unlock code of Softbank Pocket WiFi 305ZT router is also available. Now, unlocking of Softbank Pocket WiFi 305ZT is also possible, if the device is asking for NCK after changing the SIM card.
Once the Softbank Pocket WiFi 305ZT is unlocked, you can use all supported bands SIM cards of any carrier. Unlocking is one-time work, but freedom to choose any network provider SIM card.
How to Unlock Softbank Pocket WiFi 305ZT Router?
1. Switch Off the Softbank Pocket WiFi 305ZT.
2. Change the default SIM card with any another carrier.
3. Connect to PC with USB cable.
4. It will automatically open the default web page of the 305ZT, if not then open My Computer >> Virtual CD-ROM and install in your PC.
5. Login to the device through web page with admin.
6. It should redirect you to the unlocking page and will ask you for NCK.
7. Enter here correct factory unlock code and click OK.
8. The device may be rebooted to show the network.
9. Now you can start using your Softbank Pocket WiFi 305ZT router with any carrier SIM card.
Note: If above procedure does not work, then let me know via comments, I will fix it.
Note I: Factory unlock code of Softbank Pocket WiFi 305ZT router is not free, you need to pay 6USD. Correct SIMlock code will be emailed within 8 hrs.