Come on, where do you think you are travelling to—the Wild West? This city has 1.7 million residents and gets over 15 million tourists every single year, that almost 10x. Sure, there are some phone thefts, but it’s just a matter of statistics, with that many people, of course, there’ll be some opportunists—locals and foreigners alike, yep we also import thieves :) —trying to take advantage, just like in any popular touristy city in Europe. But travelling with that anxiety? That’s gotta be seriously stressful. Honestly, the chances of getting your phone stolen are low, with basic precautions that is, much like visiting any other major city —just look at the numbers.
Anyhow, if you are adamant, rather than the complete set, here you can purchase a cheap phone at any store and then get a prepaid SIM card with no contract from any of the telecommunication companies -plenty of stores in the city!. Remember you need a passport to do so -since 2017 there are laws in place here in the EU regarding purchasing SIM cards to prevent money laundering and terrorism.
Oh yeah, just keep in mind that over the past 10 years there have been quite a few scandals in the press involving hotel chains around the world — including big names like Marriott in 2018 and Hilton in 2019 — where in-room safes were reported to be insecure. Sometimes it was because they weren’t physically strong enough, other times because their electronic systems got hacked. So, just don’t assume that whatever you leave in the hotel room safe — whether in Barcelona or anywhere else around the World — is 100% secure.