As of March 2021, no longer restricted. Previously, foreign investment in fixed and mobile telecommunication services was limited to 67% of equity interest.
"APPENDIX III - REGULATION OF THE PRESIDENT OF THE REPUBLIC OF INDONESIA NUMBER 49 OF 2021 CONCERNING AMENDMENT TO PRESIDENTIAL REGULATION NUMBER 10 OF 2021 CONCERNING THE INVESTMENT BUSINESS SECTOR
LIST OF BUSINESS FIELDS WITH CERTAIN REQUIREMENTS
-  Fixed telecommunication network services, Internet interconnection services (Network Access Point), other multimedia services, Public internet telephony services  [see 2019 restrictions below]: Open (without condition)[no longer listed] [...]" (Presidential Regulation (PERPRES) No. 49 of 2021 Concerning Amendments to Presidential Regulation Number 10 of 2021 concerning Investment Business Fields [google translation])
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Previously
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"APPENDIX III - REGULATION OF THE PRESIDENT OF THE REPUBLIC OF INDONESIA NUMBER 44 YEAR 2016 CONCERNING LISTS OF BUSINESS FIELDS THAT ARE CLOSED TO AND BUSINESS FIELDS THAT ARE OPEN WITH CONDITION TO INVESTMENT - 
LIST OF BUSINESS FIELDS THAT ARE OPEN UNDER SPECIFIC CONDITIONS [...]
K. Communication and Informatic Sector
- Fixed telecommunication network services, Internet interconnection services (Network Access Point), other multimedia services), Public internet telephony services:: 67% [...]  "(PRESIDENTIAL REGULATION OF THE REPUBLIC OF INDONESIA NUMBER 44 YEAR 2016 CONCERNING LISTS OF BUSINESS FIELDS THAT ARE CLOSED TO AND BUSINESS FIELDS THAT ARE OPEN WITH CONDITIONS TO INVESTMENT)
Presidential Regulation (PERPRES) No. 49 of 2021 Concerning Amendments to Presidential Regulation Number 10 of 2021 concerning Investment Business Fields [google translation]
PRESIDENTIAL REGULATION OF THE REPUBLIC OF INDONESIA NUMBER 44 YEAR 2016 CONCERNING LISTS OF BUSINESS FIELDS THAT ARE CLOSED TO AND BUSINESS FIELDS THAT ARE OPEN WITH CONDITIONS TO INVESTMENT
[<a href="https://peraturan.bpk.go.id/Home/Details/168534/perpres-no-49-tahun-2021">PR49</a>],[<a href="https://peraturan.bpk.go.id/Home/Details/161806/perpres-no-10-tahun-2021">PR10</a>],[<a href="https://peraturan.bpk.go.id/Home/Details/40374/perpres-no-44-tahun-2016">PR44</a>]