I recommend the garmin Inreach mini (I think there is a version 2 now). Very light, decent battery life, rechargeable, works with or without a phone, reliable two way text messaging. Not very good as a stand alone gps, but that’s not really what it’s made for. Has several subscription plans, I just use the basic. I have used this on multiple Sierra trips and on some PCT sections. I highly recommend it. Also recommend getting the SAR insurance, just in case.
Nick