synonyms with 'sign in'

[Offroad]

Please, dear teachers and friends,

I am trying to get some vocabulary on signing in to web messengers, so, please, could you help me out?

Whether you need talk to someone through(?) the web, you could just say (on the mobile phone, for example):

Please, this call is too expensive, sign in to TGA messenger and call me.

I wonder what (phrasal) verbs would be synonym with "sign in":

Sign in to TGA messenger!
Login to GTR messenger!
Enter the FTE messenger!
Do login in the FRE messenger!

Thank you very much in advance!

[thedeebo]

Not a teacher.

Synonyms that can be used for "Sign in":

Sign in to TGA messenger! yes
Login to GTR messenger! yes
Enter the FTE messenger! not used in conversation
Do login in the FRE messenger! no, the repetition of "in" would sound weird to a native speaker

You might also say:
Get on/Get on to...
Go to...

"Hey, I'll see you on AIM later."

[Offroad]

Not a teacher.

Synonyms that can be used for "Sign in":

Sign in to TGA messenger! yes
Login to GTR messenger! yes
Enter the FTE messenger! not used in conversation
Do login in the FRE messenger! no, the repetition of "in" would sound weird to a native speaker

Would it be OK whether I change/drop the "to" for a "the"?

Sign in the AIM!
Log in the AIM!


You might also say:
Get on/Get on to... What happens if I drop the "to"?
Go to...

Get on AIM!
Get on to AIM!
Get on the AIM Messenger!

"Hey, I'll see you on AIM later."

Many thanks