Had some medical collections paid off, will this help?

[Daguy]

I am trying to fix my scores, 651 MID score.

I paid-off two accounts in collections one was a debt purchasing company the other was a medical debt.

The medical debt is going to be deleted, how much will this boost my score?

The other one will not be deleted will this help my score?

And I have an old account only reported on EX 122$ phone company about 4yrs old should I even bother paying it off or should I just forget it?

[RobertEG]

Paying off any account wont help FICO, unless the payment is made with aqreement by the creditor to delete all entries on the account from your CR.   Did you secure such an agreement in writing?

[Daguy]

I received a letter from the medical collection agency and it states that it is requesting that it be deleted. I am confident that it will, but how many points can this boost my score?

I have one collections that I think I will not pay unless I can get written statement that It will be deleted.