没有sim卡是可以上微信的。
没有sim卡上微信的具体操作步骤如下：
1、在手机桌面上点击打开“微信”app。
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2、接着在“微信”app的登陆页面点击下方的“用微信号/QQ号/邮箱登陆”。
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3、然后在新的页面中的账号和密码栏中输入相关信息，然后点击下方的“登录”。
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4、然后此时就可以成功登陆“微信”页面了。
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