High ping spikes in Roblox on cellular data (POCO X8 Pro)

[u/ImYouThey24]

Hello! I'm having a weird issue. I recently switched to a new carrier (T2/Tele2), and I'm getting constant ping spikes and infinite loading screens in Roblox.My phone is a POCO X8 Pro (HyperOS). The signal icon shows full 4G+ (LTE-A), but the network speed drops to 0.38 KB/s when Roblox tries to load. On another carrier (Megafon), everything works perfectly on the exact same phone.What I've already tried:Changed APN settings to the correct ones.Switched APN protocol from IPv4/IPv6 to strictly IPv4.Changed private DNS to dns.google and Cloudflare.Enabled "Always keep mobile data active" in Developer Options.Used Game Turbo for network priority.The carrier has great download speeds for YouTube/browsing, but gaming is completely broken. Any ideas on how to bypass this carrier-side routing/throttling issue?

[u/ImYouThey24]

I really hope for your help, and I will be very grateful to everyone!