The new phone is probably on 3G which would have different reception than your old 2G phone. It will fall back to 2G if need be. You should technically have better coverage since you would now have access to 2G and 3G.
I highly recommend the Samsung S425g if you'd like to get into texting. The keyboard is great.
Sent from my Galaxy Express
Castrol EDGE 5W-30 is my drug of choice.
Primary: iPhone 6 64GB, Galaxy Note 3, Galaxy Avant: 5 lines, 3x $5 Android web, 1x $2.99 T-Zones, corp discount + $10/mo loyalty discount = $93/mo tax inclusive
Secondary: Galaxy S3 LTE & iPhone 4S: TracFone (Verizon)
Mobile Broadband: HP Stream 13 w/ T-Mobile 4G & iPad Mini Retina w/ T-Mobile 4G LTE ($10/mo for 5GB with hotspot)