Hello! It's great that you want to unlock your Samsung A22 5G from Smart's network. Unlocking a phone typically requires the consent and cooperation of the original carrier, in this case, Smart. The recommendation letter they requested is a standard requirement to ensure that the phone's owner approves of the unlocking process.
If the phone is your company's property and the original carrier is not willing to cooperate without a recommendation letter, you may need to coordinate with your company's authorized personnel to obtain the necessary documentation. This is to ensure that the phone is unlocked legally and with the proper authorization.
However, if you're unable to obtain the recommendation letter, you could consider other options such as third-party phone unlocking services. These services may be able to unlock your phone for a fee, but it's important to do thorough research before using such services to avoid any potential scams or risks.
Remember that unlocking your phone without proper authorization may violate your agreement with the carrier or even local laws, so it's important to proceed with caution and follow the appropriate procedures.