Device: Samsung Galaxy S25 Ultra (16GB, 1TB config only)
Category: android
Memory: 16 GB (ram), usable for models: 12 GB
Memory bandwidth: 84.8 GB/s
MSRP (USD): 1619
TDP: 8 W
Best runtime: llama.cpp (PocketPal) or MLC-LLM (Adreno GPU path)
Notes: 16GB LPDDR5X (Micron, 12nm process) confirmed via SammyFans and SammyGuru. CRITICAL: 16GB RAM is ONLY available on the 1TB storage configuration. 256GB and 512GB configs ship with 12GB RAM. Android OS overhead ~3-4GB; usable ~12GB (community estimate). Snapdragon 8 Elite. Practical ceiling: 7B-13B Q4_K_M. Llama 3.1 8B Q4_K_M (~7GB runtime) fits with headroom; 13B Q4_K_M (~11.7GB) marginal. MLC-LLM + Adreno 830 GPU recommended for best throughput.