Huawei+e303s1+firmware+update+free: _verified_

Before downloading anything, check your current version to see if an update is actually needed: Are router firmware updates a must? : r/HomeNetworking

on the management page. Common firmware versions for this model include 22.157.18.00.858 HUAWEI Global customization or instructions for the modem to use other SIM cards? Update Your Phone System Online | HUAWEI Support Global huawei+e303s1+firmware+update+free