Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:

Convert text to sql: Show the carriers of devices in stock at more than one shop. | device : device_id , device , carrier , package_version , applications , software_platform | shop : shop_id , shop_name , location , open_date , open_year | stock : shop_id , device_id , quantity | stock.device_id = device.device_id | stock.shop_id = shop.shop_id | 

### Response:

select _ from _ group by _ having count ( _ ) > _ | select device.carrier from stock join device on stock.device_id = device.device_id group by stock.device_id having count ( * ) > 1