If you plan to travel around Montenegro during long time (1-2 weeks and more, not 1-2-3 days) I recommend buying MTEL SIM card with 500 GB Internet per month at any kiosk by 10-15 EUR per month.
MTEL definitely works in Serbia and Bosnia without any additional manipulations or surcharges.
OR
You can use eSIM from Airalo https://www.airalo.com/ru/montenegro-esim
If you plan to be in Montenegro short time you can ask WI-FI password in any cafe or bus station and connect to internet free
In these chats you can buy something cheap or find any service or car rental
There are chats in other countries of the world: https://t.me/travelask_all_chats/9
If you want to change currency, you can do it in the telegram chat
You can withdraw cash in ATM without fee at Ziraat Bank. All points are on the Google maps by link
https://www.google.com/maps/search/Ziraat+Bank/@42.3018865,18.9362281,10.54z?entry=ttu
ATMs in Montenegro charge a fee of 5 EUR for cash withdrawals. I recommend taking cash and card because you can’t pay by card in some places. For example, if you want to take a bus between cities not at the final official bus station in the city, but at an intermediate stop, then you only need to pay in cash. Even at official bus stops, the terminal very often does not work and you have to pay in cash. The situation is the same in a cafe, you can eat and only then find out that the terminal in the cafe does not work and no one told you about this before ordering food. In large supermarkets they always accept cards, in small stores 50/50 you can sometimes pay by card, sometimes only cash.
You can find bus schedule all Balkans on the website
https://busticket4.me/RUYou can load “busticket4me” app on the Android
If you didn’t find a bus on the website above you can find a car for the price of a bus in telegram group
https://t.me/poputnYou have to write “I’m looking for a car for price of a bus from A to B for N persons” where
A - Start pointhttps://t.me/Mountains_of_Montenegro
https://t.me/romiro_travelerAuthor's tours and hikes in Montenegro. Survival school. I teach how to walk in the mountains.
I have saved several interesting places in Montenegro which you can visit in next cities Budva, Kotor, Bar, Ulcinj, Podgorica below
https://maps.app.goo.gl/EsmJJRdcK8Vfppy77
You have 2 optionsIf you want to cook any things you can buy food in stores
Green Car Taxi Website https://www.greencartaxi.me
If you have local mobile number you can order taxi by call +382 69 888 801
✫ Taxi Bar +38269034962
✫ Star Taxi +38268510303
✫ Montenegro Taxi +38268515939
✫ Taxi Station +38268126366
Budva
✫ Plus Taxi +38268019198 (WhatsApp)