AT&T Internet support

Hello all-I am trying to figure out how to get a strong internet connection at a new campsite we have for the summer. My AT&T cell service is not great with one or two bars....my iphone hot spot is not cutting it for working/video calls or streaming tv. I am wondering if I use a AT&T wireless internet router and an external cellular MIMO antenna if that will get me a better signal. I also assume I need to contact AT&T to set up the service for this device. I read some posts that talked about a sim card as well...not sure if I need to deal with that??  Looking for any guidance the community can provide. Greatly appreciated. ST

How do i make a complaint about ATT customer service? The first person i talked to stated fiber installation was just a tech installing a "box" in the home. Tech appt gets cancelled by "the system", i make another appt and then no one shows up i didnt even receive a call saying they would be late. I make another appt but the customer service didnt know what they were doing and made an appt to fix my internet, i continully told them i needed fiber installed and they kept asking about my internet service!!! Next day i spoke to the tech and he said it is not for fiber installation but to fix my internet, so then it took him an hour to change the appt. He eventually came over and explained the fiber installation process which included installing a line to my home (this was never mentioned by the person who made my first appt). Two weeks later the fiber line is installed to the house, i call customer service to get a fiber appt and i'm on the phone for 45 MINUTES!!!!! Why do they need to know how many cable boxes i have to make the fiber install appt. The tech said there is a main box and then devices connect to it wirelessly!!!! Why cant they just make an appt for fiber?! this is the most ridiculous customer service!!

After numerous short-term outages and several custormer service reps, tech on the phone recommended that I replace my BGW320-500 gateway. New gateway arrived next AM. Circumstances led to a one-week delay before swapping out the gateways. New gateway arrived with detailed instructions for returning the old gateway, but zero info on how to swap out old to new. Searched online (what luck - I had service!) and found instructions, which made everything sound as easy as removing wires from the old and plugging into the new. Not. Followed instructions to the letter, but new gateway never got past a fast-blinking green light. Supplemental info also instructed me to switch to new network name and password, which would have been a real pain for all of the connected devices. Ultimately gave up and reverted to the old gateway, which HAD been behaving during the one-week delay.  After a couple of hours, the old gateway completely cratered. Tech came to the house, couldn't revive the old gateway, and proceeded to swap to the new one, including steps not mentioned in the online instructions. I watched, hoping that next time, I would be able to succeed at swapping out the gateway myself. The last step? Activating the new gateway. Me: "Show me how you did that." Tech: "Oh, it's not something you can do on your own." You can't make this s**t up. To be clear, the tech was great. The buggy product and the business model that attempts to thrust all maintenance onto the customer? Not so much. And since we're piling on..... My previous experience had been with Google Fiber. Over the course of several years, I received two unsolicited notices of credits to my account because of outages of which I had been completely unaware. With AT&T Fiber, I've lost count of the outages, but the one that stands out? My family and our guests missed the entire 2nd quarter of the February, 2023 Super Bowl, after which we moved the party and all the food to the neighbor's house, which meant we all missed the halftime show. Credits? Nada.

I am going for Europe trip with my friends! We will be covering 3 different countries. So I am a bit worried about the connectivity issues. Do I have to buy different SIM card for every country or the sim will work in all countries? Suggest me something! Since I belong to India so I am not sure which SIM card will work there?