[Matt3o12_]

Have you tried different throttles? Did you get any whatsapp account(s) banned at higher speed?

[aleixrodriala]

Yes, used different messages max sizes, with 2000 characters got the best speed but got the account banned, using 20000 is a great middle term and not banned for now, could get banned anyway, its an educational project

[cyclotron3k]

Could you try encoding data as images for better bandwidth (and probably worse latency)?

[Thorrez]

Using less characters got you banned? I don't understand why that would happen. I would think using more characters would be more likely to get you banned since it's less like what normal users do.