Walmart has shut down self-checkout options in some stores.
The decision was made due to theft and customer service issues.
Self-checkout machines are often targeted by thieves.
Customers also reported issues with the machines, such as difficulty scanning items.
Walmart plans to replace the self-checkout machines with more traditional checkout lanes.
The move is part of Walmart's efforts to improve customer experience.
Walmart has not announced how many stores will be affected by the change.