If the driver has not been officially tested, stability or compatibility issues may occur. Method 1: Open PC Manager, click Drivers and download or update the drivers. DRIVERS: VERSION: FOR WINDOWS 10, ETC.: DOWNLOAD DRIVER: HUAWEI e3531 DRIVER. 4.25.22.00. XP ⁄ VISTA ⁄ 7 ⁄ 8. 1. Turn OFF the Huawei E3531i-2. 2. Insert a different operator simcard (e.g. for a O2 device, you can use MetroPCS simcard). 3. Turn ON the phone. 4. It should prompt for "SIM Network Unlock PIN". 5. Enter the unlock code which is provided by modemsolution.com. 6. Now your Huawei E3531i-2 is unlocked permanently to use with all simcards. We have 3 Huawei HiLink E3131 manuals available for free PDF download: Product Description, Quick Manual, Quick Start Manual . Huawei HiLink E3131 Product Description (19 pages) HSPA+ USB Stick. Brand: Huawei Huawei E3531 ; Huawei E3372 ; Huawei E3276 4G LTE The Huawei E3531 is one of the Huawei HiLink line of modems and unfortunately these models are not compatible with Diafaan SMS Server. Diafaan SMS Server can work with all GSM modems that support the GSM 07.05 / 07.07 AT command standard over a (virtual) serial port or TCP/IP connection. Shop huawei e3531 3g usb modem on AliExpress: With the multiple promotions of huawei e3531 3g usb modem, you can get everything you need right from the comfort of your home. If want to save a lot of money while still being able to pay for huawei e3531 3g usb modem, there are plenty of ways to save money, such as deal hunting. Re: Huawei E3531 manual switch works, but not automatic Post by Josh » Wed Dec 07, 2016 4:15 pm Stofferl wrote: OK, i have enabled logging, but i can't replug the device, because i am accessing remotely. E3531 is one the latest model of modems and routers from huawei. Some of you must have tried E303 but you cannot use the unlock code generated using the method of E303 to unlock E3531. Network Energy Networking Solutions Unified Communications Collaboration Detected Windows Huawei Smartphone