I need to log a call using REST api from android app. I've call_direction, call_duration, and description about call. How to log this call to salesforce developer edition using REST api?

Some of blogs suggest to use task api for logging a call. Task entity doesn't have type called CALL to differentiate CALL LOG. Please let me know How to accomplish this through REST api?

Thanks,
Guna.

I want to retrieve all contacts with paging support. Such that my organizaion has 7000 contacts, I need to read 100 contcats per api call with paging support. How to accomplish this using SSQL through REST API?

I'm using this api:
https://ap5.salesforce.com/services/data/v42.0/query?q=SELECT Id,FirstName,LastName FROM Contact

Same paging support need for all the modules: leads, accounts, notes, events and tasks etc.

Thanks,
Guna.

I'm using Developer Edition in which I coud see conver option for leads. I want to convert the leads to contacts/accounts using REST api.
How to accomlish this in REST api.

Thanks,
Guna

I want to retrieve all contacts with paging support. Such that my organizaion has 7000 contacts, I need to read 100 contcats per api call with paging support. How to accomplish this using SSQL through REST API?

I'm using this api:
https://ap5.salesforce.com/services/data/v42.0/query?q=SELECT Id,FirstName,LastName FROM Contact

Same paging support need for all the modules: leads, accounts, notes, events and tasks etc.

Thanks,
Guna.

I'm using Developer Edition in which I coud see conver option for leads. I want to convert the leads to contacts/accounts using REST api.
How to accomlish this in REST api.

Thanks,
Guna