Looking for logging into the Salesforce Mobile site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Salesforce Mobile site. After that you can login as usual with your login credentials.
https://trailhead.salesforce.com/en/content/learn/modules/lex_salesforce1_basics/lex_salesforce1_basics_getting_started
https://login.salesforce.com/?locale=de
https://www.salesforce.com/de/solutions/mobile/overview/
https://help.salesforce.com/HTViewSolution?id=000187858
https://trailhead.salesforce.com/en/content/learn/modules/salesforce1_mobile_app/salesforce1_mobile_app_intro
https://help.salesforce.com/HTViewSolution?id=000187717
https://success.salesforce.com/answers?id=90630000000h3oCAAQ
https://help.salesforce.com/apex/HTViewSolution?urlname=Salesforce1-Troubleshooting-Login-Issues&language=en_US
https://developer.salesforce.com/docs/atlas.en-us.mobile_sdk.meta/mobile_sdk/auth_customize_login.htm
https://www.salesforce.com/de/
https://developer.salesforce.com/forums/?id=906F000000091i6IAA
https://www.salesforce.com/video/1765359/
https://help.salesforce.com/HTViewSolution?id=000004578