To make it easy, this map with coloured pins has many green ones. Click on them with mouse and a balloon pops up with a description of the problem (not all green are phone related, but the bulk in G are ATM. When you see the phone prefix issue, click on one of the links for ID (I use JOSM), and the editor will open on with the problem object selected, edit, save. In JOSM it's easier as it just opens the same editor app window and do all in one, then save. The ones I corrected you can use as reference check if you're stuck with a odd number.

ciao

map link Osmose: https://osmose.openstreetmap.fr/en/map/#loc=14/42.82483/13.93171&item=1xxx%2C2xxx%2C3xxx%2C4010%2C4020%2C4030%2C4040%2C4060%2C4070%2C4080%2C4090%2C4100%2C4110%2C4130%2C5020%2C5030%2C5040%2C5050%2C5060%2C5070%2C5080%2C6xxx%2C7010%2C7011%2C7012%2C7020%2C7050%2C7051%2C7070%2C7080%2C7090%2C7100%2C7110%2C7120%2C7130%2C7160%2C7170%2C7190%2C7220%2C7240%2C8010%2C8011%2C8012%2C8020%2C8021%2C8022%2C8025%2C8026%2C8030%2C8031%2C8032%2C8040%2C8042%2C8050%2C8051%2C8060%2C8070%2C8080%2C8090%2C8091%2C8100%2C8101%2C8110%2C8120%2C8121%2C8122%2C8130%2C8131%2C8132%2C8140%2C8150%2C8151%2C8152%2C8160%2C8161%2C8162%2C8170%2C8180%2C8182%2C8190%2C8191%2C8192%2C8212%2C8221%2C8230%2C8240%2C8250%2C8260%2C8270%2C8280%2C8281%2C8282%2C8290%2C8300%2C8310%2C8320%2C8330%2C8331%2C8340%2C8341%2C8350%2C8351%2C8360%2C8370%2C8380%2C8381%2C8382%2C8390%2C8391%2C8392%2C8400%2C8401%2C8410%2C8411%2C8412%2C8420%2C8430%2C8431%2C8450%2C8460%2C8470%2C8480%2C8490%2C8500%2C8510%2C8520%2C8530%2C8540%2C9000%2C9003%2C9004%2C9005%2C9006%2C9007%2C9009%2C9010%2C9011%2C9014%2C9015%2C9016%2C9017%2C9018%2C9019%2C9020&level=1%2C2%2C3