Communications and home entertainment

Internet.

Much of Indonesia had internet that could be described as, Poor, slow, terrible, or even, a waste of time but the situation is improving rapidly, most populated places having reasonable connection speeds, some suppliers offering very fast internet.
Several providers are offering faster speeds with little or no price increase, mobile 4G being available over much of the country.

Home internet is available from a wide selection of suppliers but you'll find not many places outside large towns and cities offer two options on the same street. Some wireless suppliers (Bolt comes to mind) have home wifi modems that give you very reasonable speeds without a fixed data quota.

Mobile internet is available from all operators but you will want to check coverage areas before you buy a SIM card. These SIM cards can also be used in portable wifi modems.
Telkomsel probably have the best coverage but other suppliers rival them and may be cheaper.
If your internet use is emails, news and a bit of minor browsing, one of the mobile packages with a few gigabytes per month quota is likely to be your best option. These small, portable wifi units are tiny so easily fit in your pocket to use at home, the office, or pretty much anywhere else. 
Units can be purchased from internet service providers or bought separately so any SIM card can be used. If you do that, make sure the modem will handle 4G.

You might want to note, Indonesia has 'internet sahat' (Healthy internet) that restricts a lot of sites, these mostly being extremist stuff, porn and some way out on the edge political stuff, but some normal  sites get caught up in this for no apparent reason.

Extremely important - Indonesia has extremely harsh defamation laws and the same level of seriousness on electronic communications that break local laws. NO porn of any sort should be sent by Whatsapp or whatever as you can be prosecuted and the punishments are bad. You can get 6 years for a naked picture if you're found out.

All SIM cards must now be registered against your passport or KTP, that meaning any crime associated with your number or IP address is easily traced back to the user.

Telephones and mobile phones

Telkom is the suppliers for land lines, but not very many private homes ever bothered as it was expensive and unreliable in the past, and mobile phones are far better, easier and cheaper now.
Getting a land line can be seriously hard work, and pointless for most people.

Mobile phones are a different story.
There are mobile phone shops everywhere, literally hundreds in every town, commonly with several on every larger street.
Shopping centres commonly have 10 or more shops, all selling contract free, unlocked phones.
Some suppliers sell locked contract phones, but I'm less than sure I'd ever bother with one.

There are many SIM card/airtime suppliers in Indonesia.

Telkomsel have a very wide coverage, working everywhere I've ever been

XL and Indosat are probably next on the list for coverage,

3 network have an 'always on' deal, this meaning the credit and internet quota doesn't have a time limit as long as you renew the card every year.
You pay Rp50,000 per year for the card, then add credit and internet quota as you require.
Unlike most operators, the credit and quota have no time limit, lasting until the card expires (if not renewed), or until used up.
The signal is a bit on and off in the countryside, but works well in the cities. Their internet service varies in speed, but I can usually use skype without serious problems.

All operators have an internet service, and all are getting better and faster.

Contract mobile phones are available here, but there is generally little or no advantage over pay as you go.
Most mobiles (cellphones) are bought unlocked and without a SIM card, so can be used on a selection of networks.
You can top up your phone in millions of places (literally). Every street has a phone top up place and almost every mini mart. The top up arrives in a few seconds, and off you go.
Top up is easy to do at ATMs if you have a local bank account.

One note of worth - if you top up from another mobile, the active period does not get any longer but, if you top up at a shop or ATM, it does.

All SIM cards must now be registered against your passport or KTP, that meaning any crime associated with your number is easily traced back to the user.

Calling (VOIP) apps

Skype
I use skype for calls back to the UK and, with their pay as you go system, calling land lines or mobiles is very cheap. I find this especially useful when calling companies in the UK. Skype also do a local number so UK callers can contact me at local rates. This service is available in many countries.

Google's phone service will also call most world numbers if you add credit but most US numbers are free of charge. I understand US users can now port their old cell number to Google's service and use it wherever they happen to be in the world.

Whatsapp is king of the apps out here - it's normal for people to ask your WA (Pro. way R) number rather than your telephone number. This app is an absolute 'must have' in Indonesia.
Schools use WA groups to communicate with parents, and social/professional groups use it as the standard communications tool.

Line is popular with schoolkids but less so with adults.

There are plenty more, but these are the major ones.

English language newspapers on the internet

My local favourites are:

http://en.tempo.co/http://www.thejakartapost.com/http://www.thejakartaglobe.com/https://coconuts.co/

Most world English language papers are also available free of charge but a few put up paywalls.

English language TV / Radio

All of the satellite and cable broadcasters transmit English language TV.
The cheapest packages start at less than Rp100,000/month.
Of course, you have to pay a lot more for films and sports channels but the film channels are exactly the same as in England - more repeats than fresh programmes.

You'll also find a goldmine of radio programs delivered direct from many countries, all free, and all legal.

Now many home internet providers offer fast, unlimited data services, online streaming is getting more popular.
Many major broadcasters from all over the world offer free streaming so programs are getting much easier to watch legally. Be extremely careful of pirate sites as many contain malware.