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Why O2 signal is always so bad in Berlin?
It's not just you, O2 has always been the budget option here for a reason. Their spectrum licenses in Berlin are weaker than Telekom's, so even on 5G you'll lose signal in concrete buildings or between stations on the U-Bahn. On the Ring specifically, the U8 between Hermannplatz and Schönleinstraße is a dead zone for O2, while Telekom holds a steady connection there.
If you want to test before committing, grab a Telekom prepaid card from a Rewe or a shop at Alexanderplatz for 10 euros. That way you can ride the U2 from Zoologischer Garten to Alexanderplatz and see if it holds up for calls. The monthly difference is about 15-20 euros for comparable data plans, but if you're on WhatsApp calls twice a day, that's probably worth it.
honestly the o2 thing is a known issue in berlin, they just don't have the same density of antennas in the inner ring or along the ubahn tunnels. telekom is def better but if you're not ready to commit full price, check out fraenk which runs on telekom's network for like 10 euro a month. the catch is data caps are lower but for whatsapp calls it's fine. also worth noting your s22+ might be part of the problem, the modem in those exynos models is notoriously weak on weaker signals compared to qualcomm versions. still, o2's ubahn coverage on the u8 or u9 is borderline unusable during peak hours, telekom is night and day there
yeah o2 is notoriously bad in berlin, especially underground. telekom's coverage on the ubahn lines is noticeably better, like on the u2 or u7 you can actually stream stuff. if you're making frequent whatsapp calls on the ring or in tunnels, the price difference is probably worth it. you could also try a prepaid sim from telekom like congstar or fraenk to test the network before fully switching
3 Days in Berlin: Itinerary 2026
Choose accommodation near a central transport hub like Alexanderplatz or Friedrichstraße. This saves you 15-20 minutes each day on transit. For budget options, consider the area… 🗺️ Plan Your Base
Choose accommodation near a central transport hub like Alexanderplatz or Friedrichstraße. This saves you 15-20 minutes each day on transit. For budget options, consider the area around Zoo Station (Bahnhof Zoo).
🏛️ Day 1: Mitte Highlights
Start at Brandenburg Gate (Pariser Platz) at 9am, then walk to the Reichstag building (free dome visit, book weeks ahead). By 11am, head to Museum Island (Pergamon Museum, 19€). Lunch at Hackescher Markt (street food from 5€).
🚲 Day 1 Afternoon & Evening
Rent a bike (Nextbike, 1€ per 30 min) to explore the East Side Gallery (Mühlenstraße). At 6pm, take U-Bahn to Kreuzberg for dinner at Markthalle Neun (Eisenbahnstraße 42/43). End with drinks at a rooftop bar like Klunkerkranich (Neukölln).
🎨 Day 2: Art & Alternative Scene
Morning at the Berlinische Galerie (Alte Jakobstraße 124-128, 10€). Then walk to Checkpoint Charlie (free, but crowded). After lunch, explore the street art in Friedrichshain, especially along Revaler Straße. Visit the RAW Gelände for flea market finds.
🌳 Day 2: Parks & Relaxation
Spend late afternoon at Tempelhofer Feld (former airport, free entry). Rent a bike or skate at the runways. For dinner, try the Thai park (Preußenpark) on weekends for authentic street food (5-8€ per dish).
🏰 Day 3: Day Trip or More City
Take a 30-minute S-Bahn to Potsdam for Sanssouci Palace (14€, gardens free). Return by 3pm for a visit to the Berliner Dom (9€, climb the dome). End with a river cruise from Friedrichstraße (1 hour, 15€).
🚇 Getting Around Efficiently
Buy a 72-hour Berlin WelcomeCard (34€) for unlimited transit and museum discounts. U-Bahn and S-Bahn run every 5-10 minutes. Buses 100 and 200 are tourist-friendly double-deckers passing major sights.
🍺 Local Tips & Prices
Döner kebab costs 5-7€, a beer in a bar is 4-5€. Tipping 10% is standard. Avoid taxis; use BVG trams or Uber for late nights. Most museums are closed on Mondays, so plan accordingly.
tbh the itinerary is solid but you're missing one of my favorite spots in mitte - the dussmann das kulturKaufhaus at friedrichstraße. it's a massive bookstore open till midnight and they have a great english section plus a listening station for music. perfect for a rainy afternoon or if you need a quiet break between sights
also for day 1 lunch at hackescher markt, don't just grab any street food stall. there's a little turkish place called hasir right off the square that does amazing lahmacun for 4€, way better than the generic döner spots. and if you're doing the east side gallery in the afternoon, walk a bit further to the oberbaumbrücke for the best photo spot of the river, less crowded than right at the wall
one more thing about the welcomecard - you can actually get a cheaper 72-hour ticket for like 30€ if you're not planning on using the museum discounts. i usually do the math before buying and half the time the regular transit pass wins out
nice itinerary, you've got the big stuff covered. for day 1, if you're doing the reichstag dome booking, do it first thing in the morning slot, the light is way better for photos and it's less crowded than midday. also, skip the museum island ticket if you're only hitting one museum, it's cheaper to just buy the pergamon entry alone unless you're planning to do three or four in a day.
this is a good itinerary honestly, you've covered most of the bases. one thing i'd swap is the roof bar - klunkerkranich is cool but it's on top of a parking garage and gets packed fast on summer evenings. i prefer the panorama bar at the kudamm 101 hotel if you want a view without the chaos, same price range around 5-6€ for a beer
for day 2, if you're already at raw gelände, walk five minutes to the urban spitball gallery on revaler straße. it's a tiny free space with rotating local artists, way more interesting than checkpoint charlie tbh. checkpoint charlie is basically a photo op with guys in costume charging 5€ for a picture, skip it unless you really need that shot
and a heads up on the potsdam day trip - the s-bahn ride is 45 minutes from alexanderplatz, not 30, so leave earlier than you think. also the sanssouci park closes at dusk and the palace tours run in german only unless you book the english one in advance online