arXiv:2610.23403v1 Announce Type: new Abstract: Wireless foundation models (WFMs) seek to unify diverse wireless tasks and scenarios, yet existing methods still rely on task- or scenario-specific components or deployment-time fine-tuning. This paper presents an all-in-one wireless model (AWM), a WFM that unifies multi-user channel acquisition and localization, despite their distinct data modalities and functional objectives. We reveal that user location and channel state information (CSI) at different frequencies can be viewed as attribute-specific measurements of the same wireless link. By introducing in-scenario same-attribute reference pairs as prompts, AWM converts heterogeneous attributes into alignable relativity representations, formulating intra-band channel interpolation, inter-band channel prediction, and wireless localization as unified wireless-state transformations. Further, a multi-task MateFormer is developed to perform source-attribute relativity extraction, cross-attribute relativity alignment, and target-attribute synthesis within a unified architecture, avoiding task-specific output heads or downstream fine-tuning. Comprehensive experiments demonstrate the effectiveness of model unification, including substantial gains from cross-task knowledge sharing, seamless generalization to unseen scenarios, and an efficient closed-loop service for mobile users.