You have two options here:
Consider these benefits:
Supports up to 10 simultaneous wireless devices. 4G Bands: FDD B1/B3 and TDD B40/B41. 3G Bands: WCDMA B1/B8. Huawei E5573s-856 Unlock All Network
Here is a step-by-step guide to unlocking your device and making it "network free." Why Unlock Your Huawei E5573s-856 Go to product viewer dialog for this item. You have two options here: Consider these benefits:
A: Technically yes, by flashing carrier firmware again. But why would you? Huawei E5573s-856 Unlock All Network