any reco for pocket wifi?

full image - Repost: any reco for pocket wifi? (from Reddit.com, any reco for pocket wifi?)

I wanted to purchase a pocket wifi that will suit my academic needs since I will be using it while I'm outside either at the park or coffee shops. Public wifi's are not that reliable and gadgets that will be connected there will be vulnerable to be hacked (I'm an IT student btw). Any recommendations for pocket wifi? Much preferable if it has affordable data promo or deals. TY!

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