wx.makePhoneCall

<view class="f16 mt20 flex align_center" wx:if="{{item.telephone}}">
    联系电话：<text>{{item.telephone?item.telephone:''}}</text>
    <van-icon wx:if="{{item.telephone}}" data-item="{{item}}" bind:tap="callPhone" name="phone" color="#00d59e" style="margin-left:20rpx" size="25" />
</view>

 callPhone(event) { //拨打电话
    var item = event.currentTarget.dataset.item;
    wx.showModal({
      title: '提示',
      content: '是否拨打' + item.telephone,
      success: (res) => {
        if (res.confirm) {
          wx.makePhoneCall({
            phoneNumber: item.telephone,
          })
        }
      }
    })
  },