一、可以的，注册微信号一定要用手机注册并默认绑定，注册微信之后可以取消手机绑定，操作步骤如下：
1、在手机中打开微信，在登陆窗口输入微信账号和登录密码完成登陆。
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2、在微信首页，点击菜单“我”，然后选择“设置”。
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3、在“设置”页面，选择“账号与安全”，然后点击绑定的手机号。
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4、在绑定手机号设置页，点击右上角的“菜单”图标，再点击在弹出来的“解绑手机号”并在确认窗口点击“确认”就可以解绑了。
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备注：取消手机绑定之前，需要用微信跟QQ号进行绑定，才可以取消手机绑定。
二、关于微信号
1、微信号，是登录微信时使用的账号，可以通过手机网络免费发送语音短信、视频、图片和文字，可单聊及群聊。
2、限制：微信号是登录微信时使用的账号，支持6-20个字母、数字、下划线和减号，必须以字母开头。
3、和昵称的区别：微信号：这是系统中的唯一识别号，好友可以通过微信号搜索到您，昵称：属于微信的别名，设置了昵称可以让您的朋友更容易识别出您，允许多次更改。