I have Unlocked Zong 4G Wingle Huawei E8372 Which I purchased from daraz and I can use Zong Voice Sim in it and I used 15 GB Per Month package in Rs 1009 Tax Included, and I also use Zong Hec Sim in it, and If I need I can also use Jazz Calling sim in it, but I don't use jazz / telenor / ufone I use only zong internet Hec is 3g and calling sim is 4g faster than 3g