联通是可以办理400电话的，联通400电话是以4008号段统一开头的，通话所产生的费用是由双方共同进行支付的，是主被叫话费分摊业务，也可以选择联通直接授权的代理商办理。
China Unicom can handle 400 calls. The 400 calls of China Unicom start with No. 4008 section. The expenses incurred by the calls are paid by both parties. It is the main and called call fee sharing business, and it can also choose the agent directly authorized by China Unicom.
400电话开通可全国使用
400 telephone can be used nationwide
400企业热线可绑定在现有的普通电话和中继线上，号码资源丰富，全国可快速开通，其接入码为400XXXXXXX。
The 400 enterprise hotline can be bound to the existing ordinary telephone and trunk line, with rich number resources, which can be quickly opened nationwide, and its access code is 400xxxxxxx.
联通400电话办理400电话
China Unicom 400 phone for 400 phone
一般联通400电话在营业厅办理，资费为长途0.6元/分钟，市话为0.1元/分钟，一般不提供平台，绑定号码只能是本地固定电话，不能转接手机和外地固定电话，查询话费绑定号码等需要去营业厅办理，需要提交企业的相关证明资料，例如营业执照、法人身份证等等。
Generally, China Unicom 400 calls are handled in the business hall. The toll is 0.6 yuan / minute for long-distance calls and 0.1 yuan / minute for local calls. Generally, there is no platform. The binding number can only be local fixed phones, which can not be transferred to mobile phones and other fixed phones. To query the binding number of calls, you need to go to the business hall for management. You need to submit the relevant supporting information of the enterprise, such as business license, legal person id card, etc.
代理商办理400电话
400 for agent
代理商办理400电话，一般都是以统一资费0.15元/分钟为主，部分代理商会有更优惠的价格。
When the agent deals with 400 phone calls, the unified tariff is generally 0.15 yuan / minute. Some agents will have more favorable prices.