BEN RAHIM is a tiny café with excellent coffee and bit of Arabic treats. This fancy place offers breakfast and lunch and is of great value for money. It gets crowded fast and has free Wi-Fi.
Kiezeklein is nice place with great internet. Seating capacity is limited to 10-20. Wi-Fi speed goes up to 50mbps but Few plugs options are there. Cost around $11 a day.
Best place to buy short stay local pre paid sim card. They have plenty of options for sim card with data, calling and texting. Good and quick service.
Co 23 has various flexible packages. They have conference rooms, unlimited coffee and a reliable laser printer.
Ahoy Berlin is a very cool co- working space with very fast Wifi. It is also a great place for networking. Lots of options with day/monthly passes and 24/7 access availability.