Does Unicom broadband landline phone watch work?

There are many brands of children's phone watches, so it is impossible to accurately answer whether the children's phone watches to be consulted can use Unicom's 4G mobile phone card. Any children's phone watch can use Unicom's 4G mobile phone card as long as it supports Unicom's network. Unicom's 4G mobile phone card can be used in Unicom's 3G/2G network environment, and the tariff used is still the tariff of Unicom's 4G card. Therefore, whether the children's phone watch to be consulted can use Unicom's 4G mobile phone card only needs to confirm whether the children's phone watch supports Unicom's network.