Microsoft, Google, and Apple are trying to kill the password, and now cellular operators are abutting the bandwagon.

The four major US mobile carriers — AT&T, Sprint, T-Mobile US, and Verizon Wireless — have banded calm for a new affidavit system that would manage your logins after even having to enter a password.

Called ZenKey, the system works just like any other single sign-on annual (SSO), including those from Google, Facebook, Twitter, and most afresh Apple, in that it lets you accept login requests from other websites and apps on a device you own, thereby absolutely eliminating the need for passwords.

ZenKey was originally appear last September under the moniker Project Verify.

The passwordless apparatus leverages a aggregate of factors for identification, such as your phone (something you have), biometrics (something you are), and your area in place of your passwords (something you know).

It verifies your analyze through a multi-factor contour that’s tied your mobile device by taking into annual the subscriber advice from your cell service, including IP address, SIM card details, phone number, phone annual type, and your fingerprint or face.

But this also means in order to use it, all major third-party casework — banks, social media, retail, utilities, you name it — will have to abutment ZenKey SSO. Otherwise, this carrier-based system will be a tough sell.

There’s no doubt ZenKey is trying valiantly to solve the botheration of too many passwords, but the big catechism is whether you want your carrier managing your logins across the websites and apps you use on your phone. More importantly, acceptance of this action will depend on how much trust consumers place with the wireless companies.

Just last year, all the four carriers were caught aperture the locations of most AT&T, Sprint, T-Mobile or Verizon phones in the US to an accurateness of within a few hundred yards. After this discovery, the companies agreed to stop affairs their customers’ area advice to third-party data brokers.

Another abeyant issue is the accepted threat of SIM swapping attacks — a clever social engineering trick used by cybercriminals to actuate phone carriers into appointment their victims’ cell casework to a SIM card under their control. If addition can get your number swapped, they could potentially access your online accounts too.

Read next: Has Apple afflicted its tact appear cryptocurrency?