Blizzard plans to require Overwatch 2 and Modern Warfare 2 players to use 2FA system SMS Protect to combat toxicity, but won't accept prepaid and VoIP numbers
Just like Overwatch 2, you'll need to attach a phone number to your Battle.net account to play Modern Warfare 2—and prepaid phones aren't allowed.
Context & Ripple Effects
Blizzard's SMS Protect mandate lands days after a rocky Overwatch 2 launch, when president Mike Ybarra said the servers were under a mass DDoS attack that blocked hundreds of players from logging in. The phone-number requirement is framed as an anti-toxicity and anti-smurfing measure, but it arrives on top of launch instability that already strained player goodwill.
It also extends a moderation build-out across Activision's biggest franchises: beyond account-level gating, Activision has since begun testing ToxMod, Modulate's AI voice-moderation tool, in Modern Warfare 2 — meaning Blizzard is now filtering players at signup and policing their voice chat in-game.
First-order effects
- Players whose only phone number is prepaid or VoIP-based are locked out of Overwatch 2 and Modern Warfare 2 unless they acquire a postpaid number, since Battle.net will not accept those lines for SMS Protect two-factor authentication.
Second-order effects
- Excluding prepaid and VoIP numbers creates arbitrage pressure: workarounds and resale of 'acceptable' numbers become likely, pushing Blizzard into a verification arms race it cannot fully win with SMS alone.
Third-order effects
- If the pattern holds, major multiplayer titles converge on layered identity-plus-behavior moderation — phone verification at the gate, AI voice monitoring in the session — making persistent real-world identity a de facto cost of playing flagship shooters.
The trend: Big-budget multiplayer games are shifting from reactive bans to identity-gated access, with Blizzard pairing phone verification with AI voice moderation across its shooter lineup.