I'd opt for GSM for travel.
Hi, ive bough several phones in ebay for friends and family from verizon network. We are using them here in Mexico with local sims and they work perfectly, but a friend told me that the only problem is that i wont be able to use the 4g because the phones are from verizon, that if i buy them unlocked from at&t they will work with 4G. There is no way for me to find out because the network that im with dosent have 4g in this reagion but eventually it will be here sometime this year. I want to be 4g capable when this happens and my question is if this is true or will verizons phones work with 4g? Thank you.
AFAIK, Mexico is also using Band 2 or 4 for LTE, at least in some areas where it already exists/is built out. Verizon should have phones that would cover those bands, but buying via ebay is probably the worst way to suddenly find out your phone doesn't contain the frequency band it is supposed to. Model and serial number check would be in order from the actual physical device in question. There may not be much 700MHz in use in Mexico, but probably plenty of 1900 & 1700 service for LTE (data), plus UMTS for voice (roaming). Not sure about CDMA in MX though.
The following resource should help a little-
Help, my PC with Windows 10 won't shut down properly
Since upgrading to Windows 10 my computer won't shut down properly. I use the menu button shutdown and the screen goes blank, but the system does not fully shut down. The only way to get it to shut down is to hold the physical power button down till it shuts down. Any suggestions?