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Only PC Players are required to link a phone number to play Modern Warfare 2. Read on to learn about the SMS Protect System and how to link your phone number to play Modern Warfare 2!
List of Contents
The RICOCHET Anti-Cheat Team of Call of Duty confirmed that only PC players will be required to register a phone number to play Modern Warfare 2.
In a recent anti-cheat blog post, Activision claimed that the SMS Security Policy will be implemented to enhance anti-cheat efforts and counter the illicit account market.
The employed SMS Protect System will not be affecting console players.
Team RICOCHET also reported that Warzone players that already have verified accounts will no longer be required to register a mobile phone number to play Modern Warfare 2 as well as Warzone 2.0.
The same SMS Security Policy has been implemented for Call of Duty: Warzone since May 2020.
If you are creating a new Battle.net account, make sure to include a mobile phone number under the account email section. The phone number is an optional feature in registering for an account but make sure to fill this out in order to play MW2 and Warzone 2.0.
For users with existing Battle.net accounts without linked phone numbers, follow the indicated steps below:
| Number | Step |
|---|---|
| 1 |  Log in to your Battle.net account |
| 2 |  Click the Account Details Section |
| 3 |  Select the "+ADD PHONE NUMBER" option |
| 4 |  Enter a phone number and insert the received security code |
The SMS Security Policy will also be employed for Steam users. To link a mobile phone number to your account, follow the specified steps below:
| Number | Step |
|---|---|
| 1 |  Log in or create a Steam account |
| 2 |  Click on the account details section under your username |
| 3 |  Select the "+ADD A PHONE NUMBER" option in the Contact Info |
| 4 |  Enter a phone number and verify by clicking the link sent via email |
| 5 |  Insert the received SMS Code |
The easiest way to resolve any issues on your account is to contact Customer Support. They will most likely get back to you within the day.
| 1 |  Click on Customer Support. |
| 2 |  Choose Account. |
| 3 |  Talk to Customer Service. |
| 1 |  Click on Support. |
| 2 |  Choose Steam Guard Mobile Authenticator. |
| 3 |  Select the appropriate option. |
By having players' phone numbers tied to only one account, it'll help prevent instances of cheating. According to Team RICOCHET, the SMS policy will enhance anti-cheat enforcements.
The SMS Security Policy also maintains account security for players. Activision mentions the illicit account market as a primary reason for upholding the SMS Policy.
According to Activision, PC players will only be allowed to play the game if they have their phone numbers verified. This looks to be an ongoing feature for PC versions of Call of Duty games.
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